when后可直接加例句如下Manypeoplehavetheexperiencethattheyforgethowtowritewhenpickedupapen.答案改错是把pick改成picking,但是拿起笔的动作应该是瞬间动作啊,不能用（theyare）pickingup..

Question

when后可直接加 例句如下
Many people have the experience that they forget how to write when picked up a pen.
答案改错是把pick改成picking,但是拿起笔的动作应该是瞬间动作啊,不能用（they are）picking up..

Answer 1

主语是people 啊,主动的,所以不能用picked 可以改成 when they are picking up