1.　　.一般过去时　　标志词：yesterday, last week, three years ago, in 1987　　He lived in London when he was young.　　In the l600’s。

travelers from Europe_brought__ (bring) back diamonds from India.(6A 2000 上 )　　3.一般将来时( tomorrow , next week 等)　　Will (shall) + 动词原形　　Am (is, are) going to +动词原形　　Am (is, are) about to +动词原形　　Am (is, are) to +动词原形　　We’ll have to be careful in doing business with them.　　4.现在进行时 (now)　　Am (is, are) + doing　　What are you doing?　　I’m doing some washing.。