每个人的学习都有自己难以克服的地方,有些同学就是觉得情态动词很复杂,总是容易除左,也有人觉得情态动词在中考英语中是相对简单的语法点,英语情态动词总是容易错怎么办?搞清楚今天文章里讲的就足够应对啦!学起来哟!
易错知识点清单
1. can与be able to
can和be able to表示能力时用法相同,但can只有原形和过去式(could)两种形式,在其他时态中要用be able to来表示。另外be able to常常指经过努力,花费了时间和劳力之后才能做到某事。如:
Jim can't speak English.吉姆不会说英语。
He could speak English at 5.他五岁时就会说英语。
We'll be able to see him next week.下星期我们将会见到他。
2. can与may
(1) can和may均可用来征求意见或许可,意为“可以”,一般可互换使用。如:
Can/ May I help you?我能帮助你吗?#p#副标题#e#
(2) can和may表示可能性时的区别:
1)在肯定句中用might,may,must,不用can;
2)在疑问句中表示推测用can,不用might,may,must;
3)在否定句中用can't(不可能),不用may,must。 如:
She may be in the classroom.她可能在教室里。
Where can they be now?他们现在可能在哪儿?
That can't be true.那不可能是真的。
3. may be与maybe
may be中的may为情态动词, be为动词原形,在句中作谓语。而maybe是副词,意思是“大概、也许”,相当于perhaps,常放在句首,作状语。如:
He may be wrong,but I'm not sure.
也许他错了,但我也不确定。
Maybe she'll come this afternoon.
她可能今天下午来。
4. can't与mustn't
(1) can't 根据其基本用法可译为”不会、不能“。如:
I can't speak English.我不会说英语。
We can't do it now because it's too dark.
天太黑了,我们现在不能干了。
(2) can't在否定句中表示推测,意思是“不可能”。如:
The man can't be our teacher because he is much younger than our teacher.那个人不可能是咱们老师,他年轻得多。
(3) mustn't 意为“ 禁止、不许”,用来表达命令,表示强烈的语气。 如:
You mustn't play football in the street. It's too dangerous.
你不可以在街上踢足球,太危险了。
5. must与have to
must侧重于个人意志和主观上的需要。have to侧重于客观上的需要,如:
I know I must study hard.我知道我需要努力学习。
My brother was very ill,so I had to call the doctor in the mid-night.我弟弟病得厉害,我只得半夜里把医生请来。
I don't have any money with me,so I'll have to borrow some from my friend.我身上没带钱,只好向朋友借点了。