I haven't seen him since the summer before last.

　　我已有兩個(gè)夏天沒見過他了。

　　Each summer a new batch of students tries to find work.

　　每年夏天都有一批新的學(xué)生要找工作。

　　I made painting the house my project for the summer.

　　把房子粉刷了一遍，這就是我的夏季工程。

　　What time does it get dark in summer?

　　夏天什么時(shí)候天黑？

　　She's been working there since the beginning of last summer.

　　她自從去年夏初起就一直在那里工作。