1.I didn't know when I should go. 我不知道该什么时候走。 [I have no idea when I should go.同位语] 2.The man doesn't know what he can do. 那个人不知道他能做什么。 [The man has no idea what he can do]
what应改为want 然后4句采用同一改法: 1.I didn't know when to go. 2.The man doesn't know what to do. 3.They know where to go. 4.I want to know how to finish it. 希望有帮助