Ответ:

Ex. 1

1. I've peeled the onion.

2. We have decorated the room.

3. Her brother has done sums very well.

4. The students have translated this text from English into Ukrainian.

5. They have made up dialogues at the lesson.

6. You already have asked questions.

Ex. 2

1. Has she been trying to pass her driving test since the beginning of the year?

2. Have they been building the house for 3 years?

3. Has she been collecting stamps since 1932?

4. Have I been studying English for 5 years?

5. Has she been working on this exercise for 5 minutes?

6. Have they been living at their present address for 5 years?

Объяснение:

Present Perfect образуется следующим образом:

N + have/has + V3

где N - подлежащее, а V3 - глагол в третьей форме.

Present Perfect Continuous образуется следующим образом:

N + have/has been V-ing

где N - подлежащее, а V-ing - глагол с -ing.