第1个回答 2011-01-15
应该是they built a house. 在去年建了就在句末加last year.
什么时候用be动词?
1. be动词的意思是“是”,表“判断”。后面可以加很多不同的词,如名词,代词,数词,形容词,介词等等,如:
They are glasses. 名词
This is my sister 形容词性的物主代词
I am five years old.数词
He is tall.形容词
He is in the room.介词
2. 不能加行为动词的原型,如:
不能说I am come from China. am和come只能用其中一个,I am/come from China.
有be动词的句子,变一般疑问句,把be 动词提前:Are you from ...
有行为动词的句子,变一般疑问句,要配上助动词Do 提前:Do you come from...
3. 但可以加行为动词的现在分词形式(加ing,表正在发生)或过去分词形式(规则动词加ed,表被动语态),如:
They were building a house. 他们正在建一栋房子。
The house was built last year. 这栋房子是去年建的。
第2个回答 2011-01-15
They built a house.他们建了一所房子。(已经建好)
They are building a house.他们正在建一所房子。
They built a house last year.他们去年建了一所房子。
A house was built by them. 他们建了一所房子(已建好)。(被动句)
A house is being built by them.他们正在建一所房子。(被动句)
第3个回答 2011-01-15
他们建了一所房子they built a house
他们在去年建了一所房子they built a house last year
be动词表被动,和进行时连用时,或there be 句型
第4个回答 2011-01-15
他们在去年建了一所房子they built a house last year.
具体描述去年建房的过程时,用过去进行时they were building a house
如果只是陈述事实,就用过去时就行了
关键看上下文,看语境
第5个回答 2011-01-15
他们建了一所房子 可以用完成时 they have built a house 或是过去式they built a house,都可以,具体看语境。但不能用你说的被动
他们去年建了一所房子 they built a house last year.