Put the verbs in brackets into the present perfect or the present perfect continuous.
1. Don't walk in there! I (just/clean) the floor.
2. Jane's hungry. She .. (not/eat) anything for six hours.
3. She is tired. She ...(study) for four hours.
4. I don't want to see that film again. I (see) it twice already.
5. Sandy ...(teach) English for ten years.
6. Chris (not/do) the washing-up yet.
7. He ....(work) all morning.
8. They ... (play) in the garden for two hours.

have just cleanedhasn't been eatinghas been studyinghave seenhas been teachinghasn't donehas been workinghave been playing