Application 1 Write the correct present perfect verb form in the following sentences.
1 We
have
studied
(study) for the exam for a week.
2 Since last week, he
(write) five pages of his novel.
3 She
(fall) many times since she started rollerblading.
4 For many weeks, the jury
(hear) testimony.
5 Since last year, Carl
(feel happy at work.
6 Michelle
(sleep) late since she was a teenager.
Application 2 Some of the most troublesome irregular verbs are dealt
with in the exercise that follows. For each sentence, write the verb(s) in the
simple past or one of the perfect tenses. Read the sentences aloud