不一定的。
when 根据需要可以用于各种时态。
例如:
When will your father come back?(一般将来时)
When did you buy your computer?(一般过去时)
I was watching TV when my father came back.(过去进行时)
The film had been on for half an hour when we arrived at the cinema.(过去完成时)
祝你开心。
无此规定。可用于任何时态,作时间、条件状语从句成分。
不一定。根据不同语境可以用
1,过去完成时:The plane had taken off when I arrived at the airport.
2,一般现在时:Please give me a call when you have further information.
3,一般过去时:My father went out when I came back home.
【俊狼猎英】团队