{"id":3438,"date":"2025-07-15T21:30:09","date_gmt":"2025-07-15T14:30:09","guid":{"rendered":"https:\/\/edumaenglish.edu.vn\/?p=3438"},"modified":"2025-07-15T21:30:09","modified_gmt":"2025-07-15T14:30:09","slug":"english-auxiliary-verb","status":"publish","type":"post","link":"https:\/\/edumaenglish.edu.vn\/en\/english-auxiliary-verb\/","title":{"rendered":"English Auxiliary Verb"},"content":{"rendered":"<h2>Summary<\/h2>\n<div class=\"summary\">Auxiliary verbs (also known as &#8220;helping verbs\u201d) are used alongside main verbs to form various tenses, moods, voices or grammatical aspects. They help express nuances like time, ability, possibility, necessity or obligation.<\/div>\n<p><a id=\"toc-3\" name=\"toc-3\"><\/a><\/p>\n<h2>In-depth Explanation<\/h2>\n<div class=\"explanation\">\n<p dir=\"ltr\">The most common auxiliary verbs are be, have, and do. Modal verbs such as\u00a0can,\u00a0could,\u00a0may,\u00a0might,\u00a0must,\u00a0shall,\u00a0should,\u00a0will\u00a0and\u00a0would\u00a0also serve auxiliary functions.<\/p>\n<p dir=\"ltr\">\n<p><a id=\"toc-4\" name=\"toc-4\"><\/a><\/p>\n<h3 dir=\"ltr\">Primary Auxiliary Verbs<\/h3>\n<p dir=\"ltr\">The primary auxiliary verbs are\u00a0be,\u00a0have\u00a0and\u00a0do. They help form different verb tenses and structures, such as the continuous (or progressive) tenses, the perfect tenses and the passive voice.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Be<\/strong>: Used to form the continuous tenses and the passive voice.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">She\u00a0<strong>is<\/strong>\u00a0reading a book.<\/p>\n<p dir=\"ltr\">We\u00a0<strong>were<\/strong>\u00a0talking on the phone.<\/p>\n<p dir=\"ltr\">Their meals\u00a0<strong>are<\/strong>\u00a0prepared by a professional chef.<\/p>\n<p dir=\"ltr\">The cake\u00a0<strong>was<\/strong>\u00a0baked by my sister.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Have<\/strong>: Used to form the perfect tenses, indicating actions completed at different times.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">I\u00a0<strong>have<\/strong>\u00a0finished my homework.<\/p>\n<p dir=\"ltr\">He\u00a0<strong>had<\/strong>\u00a0already left before we arrived.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Do<\/strong>: Used to form questions, negatives and emphatic sentences in the simple present and simple past tenses.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Do you like coffee?<\/p>\n<p dir=\"ltr\">He\u00a0<strong>didn\u2019t<\/strong>\u00a0come to the party.<\/p>\n<p dir=\"ltr\">I\u00a0<strong>do<\/strong>\u00a0like cake, just not carrot cake!<\/p>\n<p dir=\"ltr\">\n<p><a id=\"toc-5\" name=\"toc-5\"><\/a><\/p>\n<h3 dir=\"ltr\">Modal Auxiliary Verbs<\/h3>\n<p dir=\"ltr\">Modal auxiliary verbs are used to express modality, such as ability, permission, possibility, necessity and obligation. Unlike primary auxiliaries, modal verbs don\u2019t change form based on the subject and are followed by the base form of the verb. Here are some examples:<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Can<\/strong>: Used to express ability or possibility.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">She\u00a0<strong>can<\/strong>\u00a0speak three languages.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Could<\/strong>: Used to make polite requests or to indicate a past ability.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><strong>Could<\/strong>\u00a0you help me with this?<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Must<\/strong>: Expresses a strong obligation, necessity or requirement.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">You\u00a0<strong>must<\/strong>\u00a0wear a helmet when riding a bike.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Will<\/strong>: Used to indicate a future action or to make a promise or decision.<\/p>\n<\/li>\n<\/ul>\n<p>I\u00a0<strong>will<\/strong>\u00a0call you tomorrow.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><strong>Should<\/strong>: Used to give advice or make recommendations.<\/p>\n<\/li>\n<\/ul>\n<p>You\u00a0<strong>should<\/strong>\u00a0eat more vegetables.<\/p>\n<p>&nbsp;<\/p>\n<p><a id=\"toc-6\" name=\"toc-6\"><\/a><\/p>\n<h3>Using Multiple Auxiliary Verbs<\/h3>\n<p dir=\"ltr\">In some tenses, we use multiple auxiliary verbs together in one sentence.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\">For example, in the\u00a0<strong>present perfect continuous<\/strong>\u00a0tense we use the auxiliary verbs\u00a0have\u00a0(conjugated according to the subject) and\u00a0been\u00a0(the past participle of the verb\u00a0be), along with the main verb in the -ing form. For example:<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">She\u00a0<strong>has been<\/strong>\u00a0working here for five years.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\">Similarly, we use the auxiliary verbs had been to form the\u00a0<strong>past perfect continuous<\/strong>:<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">We\u00a0<strong>had been<\/strong>\u00a0working for an hour when our boss arrived.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\">In the\u00a0<strong>future perfect continuous<\/strong>, we use the auxiliary verbs will be:<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">She\u00a0<strong>will be<\/strong>\u00a0arriving soon.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\">In the\u00a0<strong>future perfect tense<\/strong>, we use the auxiliary verbs will have:<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">They\u00a0<strong>will have<\/strong>\u00a0finished the project by tomorrow.<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\">\u00a0Sometimes, we can even use three auxiliary verbs in one sentence. For example:<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">I\u00a0<strong>might have been<\/strong>\u00a0sleeping when you called.<\/p>\n<p dir=\"ltr\">She\u00a0<strong>should have been<\/strong>\u00a0studying instead of watching TV.<\/p>\n<p dir=\"ltr\"><strong>Could<\/strong>\u00a0they\u00a0<strong>have been<\/strong>\u00a0waiting for us this whole time?<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Summary Auxiliary verbs (also known as &#8220;helping verbs\u201d) are used alongside main verbs to form various tenses, moods, voices or grammatical aspects. They help express nuances like time, ability, possibility, necessity or obligation. In-depth Explanation The most common auxiliary verbs are be, have, and do. Modal verbs such as\u00a0can,\u00a0could,\u00a0may,\u00a0might,\u00a0must,\u00a0shall,\u00a0should,\u00a0will\u00a0and\u00a0would\u00a0also serve auxiliary functions. Primary Auxiliary Verbs &#8230;<\/p>","protected":false},"author":2,"featured_media":3439,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[259],"tags":[1339,1345,1349,1333,1347,1341,1343,1344,1335,1336,1332,1327,1329,273,1330,1337,1331,287,1348,1334,1328,1342,1340,1346,1338],"class_list":["post-3438","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-verb","tag-auxiliary-verb-examples","tag-auxiliary-verb-exercises","tag-auxiliary-verb-grammar","tag-auxiliary-verb-structure","tag-auxiliary-verb-vocabulary","tag-auxiliary-verbs-in-negatives","tag-auxiliary-verbs-in-questions","tag-bai-tap-tro-dong-tu","tag-be-do-have-auxiliary-verbs","tag-cach-dung-tro-dong-tu","tag-cong-thuc-tro-dong-tu","tag-english-auxiliary-verb","tag-english-auxiliary-verbs","tag-hoc-tieng-anh-cung-eduma","tag-hoc-tro-dong-tu","tag-how-to-use-auxiliary-verbs","tag-learn-auxiliary-verbs","tag-learn-english-with-eduma","tag-ngu-phap-tro-dong-tu","tag-tro-dong-tu-be-do-have","tag-tro-dong-tu-tieng-anh","tag-tro-dong-tu-trong-cau-hoi","tag-tro-dong-tu-trong-cau-phu-dinh","tag-tu-vung-tro-dong-tu","tag-vi-du-tro-dong-tu"],"_links":{"self":[{"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/posts\/3438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/comments?post=3438"}],"version-history":[{"count":1,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/posts\/3438\/revisions"}],"predecessor-version":[{"id":3440,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/posts\/3438\/revisions\/3440"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/media\/3439"}],"wp:attachment":[{"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/media?parent=3438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/categories?post=3438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/edumaenglish.edu.vn\/en\/wp-json\/wp\/v2\/tags?post=3438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}