when引导的时间状语主句从句时态

可以参考《结束蹦单词时代：外教教你用连词》,中国书籍出版社,第165-166页：
1.When he sleeps,he often sucks his thumb.
2.I always drink coffee when I work.
3.When he gave me a present,I thanked him.
4.She cuddled her teddy bear when she went to sleep.
5.When I am studying,my dog sits under the desk.
6.I usually set the table when my mum is cooking the dinner.
7.When I was walking along,I came across a friend of mine.
8.My friend waved to me when I was cycling past.
9.When I have finished my studies,I am going to work abroad.
10.I shall give you a call when you have finished work.
11.When they had finished eating their meal,the guests moved to the lounge for some coffee.
12.The cat looked terrified when I had found her.
13.When driving,wear your seat belt.
14.I saw a squirrel in the park when going for a jog.
when 引导的从句可以用一般现在时（主句用一般现在时）、一般过去时
（主句用一般过去时）、现在进行时（主句用一般现在时）、过去进行时
（主句用一般过去时）、现在完成时（主句用将来时）,或过去完成时（主
句用一般过去时）.when 后面还可以去掉 "主语＋be",直接用动名词
（主句用一般现在时或一般过去时）.