英语翻译用一般过去时和现在完成时完成下列句子1.我们买这本书3年了2.他感冒三天了3.自从上周我姐的这本书4.我成为一个学生两年多了5.Mr Black 死了三年了6.小明参军半年了7.我们上8年学了-句子

注意持续动作和短暂动作的转换

1 we have had the book for 3 years

we bought the book 3 years ago

2 he has had a cold for 3 days

he caught a cold 3 days ago

3 I have kept the book since last week

i borrowed the book last week

4 i have been a student for more than 2 years

i became a student more than 2 years ago

5 Mr black has been dead for 3 years

Mr black died 3 years ago

6 xiaoming has served the army for half an year

xiaoming joined the army half an year ago

7 we have been at school for 8 years

we started school 8 years ago

8 the class has been over for 10 minutes

the class finished 10 minutes ago

9 the film has been on for an hour

the film started an hour ago

10 the door has been open for half an hour

the door opened half an hour ago