The three auxiliary verbs in English are be, do, and have.

Be

Be is used with a verb~ing to make continuous forms. All continuous sentences need the auxiliary verb, be.

  • The patient is complaining about his cold. (present continuous)

  • The doctor was relying on the medicine she prescribed. (past continuous)

  • I have been coughing for two weeks now. (present perfect continuous)

  • He will be diagnosing children at the hospital. (future continuous)

  • Those sirens are loud. They must be going to the ER. (infinitive continuous)

Be is also used with past participles to make passive sentences.

  • She is being diagnosed by a wonderful doctor. (present continuous passive)

  • The body was preserved by special medical techniques. (past simple passive)

  • The cancerous cells have been destroyed. (present perfect passive)

  • My fracture will be healed in a couple weeks. (future passive)

  • Your research needs to be done during medical school. (infinitive passive)

Review - Auxiliary Verbs 1

Mark explains the uses of auxiliary verbs


Do

Do, does, or did are used in the present or past simple tenses. Generally, they are used mainly in questions and negative sentences.

  • Where does it hurt? (question)

  • They don't do that at this hospital. (negative)

  • Does he understand? (question)

  • She didn't have the surgery yesterday. (negative)

Do, does, or did are also used to express emphasis.

  • I usually don’t like injections, but I do get the flu shot.

  • She said she doesn’t have any allergies, but she does have a rash.

  • "Why didn't you go to the doctor yesterday?" "I did go!"

  • "I thought he doesn’t like herbal medicine." "He does like it!"

Review - Auxiliary Verbs 2

Mark explains the uses of auxiliary verbs


Have

Have is used with past participles to make perfect verb forms.

  • I haven't gotten sick this year. (present perfect simple)

  • She hadn't scheduled the surgery. (past perfect simple)

  • When you begin treatment, the cancer will have already slowed its growth. (future perfect simple)

Have or have got can be used for present possession or obligation. Notice the differences:

  • Do you have an ache? Yes, I do. / No, I don't.

  • Have you got any allergies? Yes, I have. / No, I haven't.

  • Does he have to throw up? Yes, he does. / No, he doesn't.

  • Has he got to go to the hospital? Yes, he has. / No, he hasn't.

  • Doesn't she have a primary physician? Yes, she does. / No, she doesn't.

  • Hasn't she got an appointment? Yes, she has. / No, she hasn't.

These are both possible only in the present tenses. For other tenses, only use have for possession or obligation.

  • I had a cast when I was young. (past possession)

  • She will have another MRI in an hour. (future possession)

  • We have had this doctor for a long time. (present perfect possession)

  • She would like to have her medical license soon. (infinitive possession)

  • You had to call your doctor. (past obligation)

  • They will have to prescribe something else. (future obligation)

  • I have had to take the bus to medical school every day this year. (present perfect obligation)

Have is used instead of have got in many phrases and expressions.

  • have breakfast, lunch, dinner, etc.
  • have a great / terrible time
  • have a shower / bath
  • have fun
  • have a party
  • have a word with you

Review - Auxiliary Verbs 3

Mark explains the uses of auxiliary verbs


Other uses of auxiliary verbs in English:

Question Tags

  • It's infected, isn't it?

  • She has a temperature, doesn't she?

  • He had the scans yesterday, didn't he?

  • You won't do that, will you?

  • You've been here a long time, haven't you?

  • We aren't doing the surgery today, are we?

Short Answers

  • "Are you studying medicine?" "Yes, I am."

  • "Did they cure her?" "Yes, they did."

  • "Have you been here long?" "No, I haven't."

  • "Does she understand?" "No, she doesn't."

Reply Questions

  • "We work in a very large hospital." "You do?" / "Do you?"

  • "She doesn't have to worry about allergies." "She doesn't?" / "Doesn't she?"

  • "He didn't get food poisoning." "He didn't?" / "Didn't he?"

  • "They won't be here next week." "They won't?" / "Won't they?"

  • "I have been in the pharmacy for one hour." "You have?" / "Have you?"

Review - Auxiliary Verbs 4

Mark explains the uses of auxiliary verbs


Exercise

Using what you have learned about auxiliary verbs, complete the activity.

Exercise

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