He started late,but he___catch the 8'clock bus.A.couldB.was able toC.mightD.ought tocould和 was able to有什么区别呢?这道题好迷糊,觉得好像都可以.

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/08 13:55:07
He started late,but he___catch the 8'clock bus.A.couldB.was able toC.mightD.ought tocould和 was able to有什么区别呢?这道题好迷糊,觉得好像都可以.

He started late,but he___catch the 8'clock bus.A.couldB.was able toC.mightD.ought tocould和 was able to有什么区别呢?这道题好迷糊,觉得好像都可以.
He started late,but he___catch the 8'clock bus.
A.could
B.was able to
C.might
D.ought to
could和 was able to有什么区别呢?这道题好迷糊,觉得好像都可以.

He started late,but he___catch the 8'clock bus.A.couldB.was able toC.mightD.ought tocould和 was able to有什么区别呢?这道题好迷糊,觉得好像都可以.
选B,could不表示时态,所以选was able to,详细解释如下:
1)can could 表示能力;可能 (过去时用could),
只用于现在式和过去式(could).be able to可以用于各种时态.
They will be able to tell you the news soon. 他很快就能告诉你消息了.
2)只用be able to
a. 位于助动词后.
b. 情态动词后.
c. 表示过去某时刻动作时.
d. 用于句首表示条件.
e. 表示成功地做了某事时,只能用was/were able to, 不能用could.
He was able to flee Europe before the war broke out.
= He managed to flee Europe before the war broke out.

注意:could不表示时态
1)提出委婉的请求,(注意在回答中不可用could).
--- Could I have the television on?
--- Yes, you can. / No, you can't.
2)在否定,疑问句中表示推测或怀疑.
He couldn't be a bad man.
他不大可能是坏人.
can用于表示“能力”时是指现在的能力,过去或将来的能力通常用was/were able to或will/shall be able to表示.
eg. She was able to go to school yesterday.
Soon she will be able to swim a quarter of a mile.
Can的过去式形式could也可用于表示泛指过去的能力.如:
I could read when I was four.
但不能用于表示特定的某一过去能力,如不能说:
*He could swim halfway before he got tired.
He was able to swim halfway before he got tired.
上述这种用法的区别不存在于否定句中.在否定句中,couldn’t与was/were not able to 可以互换使用.
eg. I couldn’t see him again before he left.
I wasn’t able to see him again before he left.
另外,要说一个阶段延续至今的能力,可用have/has been able to表示.
eg. John has been able to swim for many years.
注意的一点是:can也可以用于表示“许可”.它可以表示现在许可或将来许可,过去许可用could表示,此时一律不能用be able to的某种形式替换.

两者都表示能够的意思,但是后者强调的是有这种能力,而前者说的更委婉些,表示有这种可能 这是未知情况 所以选could

B

but yesterday he _ (get) up late He started late,but he___catch the 8'clock bus.A.couldB.was able toC.mightD.ought tocould和 was able to有什么区别呢?这道题好迷糊,觉得好像都可以. Though he started late,Mr Guo played the piano as well as,if not better than,Miss Liu.翻译句子 when he was only three ,he started having ___ lessons .He could think of nothing but music. The young man speaks very good English,but a______ he started to learn English only 一年. He often [ ][come]to school early,but yesterday he [ ][be] late. He got up late ,but he was ____ (luck) enough to catch the bus. He was supposed ____ (come)there at 7 am,but he was ten minutes late on w_ he gets up early ,but at w_ he gets up late 关于悬垂结构性的改错.2.Though received late at night,he started to work on the document immediately.答案是改为Though he received the document late at night,he started to work on it immediately.而我改为 Received late at night,he sta Tom's brother doen't always get up late ,does he?________.but he gets up late on weekendsA,yes he does B No ,he doesn't 英语翻译逻辑好像有点说不清啊1.They started late but the ____ get there in time.A could B can C were able to D may his brother got up late but now he gets up early.同义句his brother _ _got up late. Tom lives far from his school ,but he never arrives late for school.改同义句 翻译he tried to catch the bus but was a little too late. my father is now in his late forty but he looks young for his age 改错 He is often late for class ,but the teacher doesn't m---- it. He aways gets to school early.but it`s u_______ for him to be late.