Make sentences. Use the present perfect simple and continuous with for or since
1. Sarah/do housework since nine o'clock/clean three rooms 2. I/study Chinese for a month/ not learn much yet 3. Ben/ collect more than a thousand stamps/ collect them since he was ten 4. I/ chop vegetables for fifteen minutes/ chop enough for the pizzas?
Sarah has doing housework since nine o'clock has cleaned three rooms
I have studied chinese for a month haven't learning much yet
Ben has collected more than a thousand stamps has collecting them since he was ten.
I have choping vegetables fot fifteen minutes has chop enough for the pizzas?