I was eighteen when I got my driving license.
我拿到驾照时才十八岁。
She was twenty-one when she got married.
她结婚时才二十一岁。
I loved history when I was at school.
我上学时喜欢历史。
when she came into my room I was just reading a book.
她走进我房间时，我正在看书。
Sorry, I was out when you called me.
对不起，你打电话来的时候我出去了。
When I got to the airport, the guests had left.
当我赶到飞机场时，客人们已经离开了。
When he had finished his homework, he took a short rest．
当他完成作业后，他休息了一会儿。
Why do you want a new job when you have got such a good one already？
你已经找到如此好的工作，为何还想再找新的？
You shall borrow the book when I have finished reading it.