Jawaban:

1. Wenny has done the assignment for thirty minutes

2. The children have played the football in the field for an hour

3. The man has glanced at me for a minute

4. The boy has eaten the snack since five minutes ago.

5. Susan has called me for twenty minutes

6. The students have submitted the exercises since forty minutes ago

7. Marry has slept for two hours

8. Mrs. Qorry has taught Math for ten years

9. Dona has finished the assignment since three hours ago.

10. We have waited for the bus for an hour.

Penjelasan:

Untuk kalimat dalam present perfect tense, rumusnya adalah:

Subjek + have/has + verb-3

Apakah pakai have atau has, tergantung siapa subje kalimatnya.

Kalau subjeknya adalah: I, You, We, They , dan noun dalam bentuk jamak (misalnya: Our parents, the students, people, two dogs dst) maka menggunakan have

Kalau subjek kalimatya: He, She, It, dan noun bentuk singular  (misalnya: my dog, my mother. the cat dst) atau uncountable noun (milk, sugar dst) maka memakai has.

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