时间:2017-08-25 10:29:38
来源:网络 作者:May
零基础英语:助动词be的用法
1) be +现在分词,构成进行时态,例如:
They are having a meeting.
他们正在开会。
English is becoming more and more important.
英语现在越来越重要。
2) be + 过去分词,构成被动语态,例如:
The window was broken by Tom.
窗户是汤姆打碎的。
English is taught throughout the world.
世界各地都教英语。
3) be + 动词不定式,可表示下列内容:
a. 表示最近、未来的计划或安排,例如:
He is to go to New York next week.
他下周要去纽约。
We are to teach the freshpersons.
我们要教新生。
说明: 这种用法也可以说成是一种将来时态表达法。
b. 表示命令,例如:
You are to explain this.
对此你要做出解释。
He is to come to the office this afternoon.
要他今天下午来办公室。
c. 征求意见,例如:
How am I to answer him?
我该怎样答复他?
Who is to go there?
谁该去那儿呢?
d. 表示相约、商定,例如:
We are to meet at the school gate at seven tomorrow morning.
我们明天早晨7点在校门口集合。