EDITING ESSAYS
616 Part Five • Other Grammar Concerns
Modals and Present-Perfect Verbs
Present-perfect verbs use the helping verb has or have and the past parti-
ciple of the base verb. When the sentence has a modal auxiliary before the
verb, the helping verb is always have, not had.
PRESENT-PERFECT VERB MODAL AND PRESENT-PERFECT VERB
I have called an ambulance. I could have called an ambulance.
You have lied to me. You may have lied to me.
Kyle has gone to the store. Kyle might have gone to the store.
We have visited the hospital. We should have visited the hospital.
They have brought a gift. They must have brought a gift.
Three common problems students have when using modals and
present-perfect verbs are the following:
Using Had Instead of Have. Always use have.
INCORRECT CORRECT
Sharon could had won. Sharon could have won.
I might had got that job. I might have gotten that job.
You should had seen the show. You should have seen the show.
We would had missed the bus. We would have missed the bus.
They must had seen the accident. They must have seen the accident.
Omitting Have.
INCORRECT CORRECT
I could worked last night. I could have worked last night.
He might walked home. He might have walked home.
You should answered the phone. You should have answered the phone.
We would liked to go. We would have liked to go.
They must planned the surprise. They must have planned the surprise.
Using the Past-Perfect Verb Have. The verb have can be a helping verb
with the base verb in the past perfect, and it can also be the main verb.
When it is the main verb, use the past-participle form of the verb: had.
This is what you do with all modals and past-perfect verbs (modal + helping
ANK_47574_33_ch33_pp582-630 r5 ko.indd 616ANK_47574_33_ch33_pp582-630 r5 ko.indd 616 10/29/08 10:22:10 AM10/29/08 10:22:10 AM