>国际> 新太阳城娱乐集团,《新概念英语》同步讲义:第2册第43课

新太阳城娱乐集团,《新概念英语》同步讲义:第2册第43课

摘要:本课的重点语法是情态动词can与be able to的对比用法。在一般现在时主动语态中表示“能、会”时,两者意义差别不大,可互换。

新太阳城娱乐集团,《新概念英语》同步讲义:第2册第43课

新太阳城娱乐集团,1、周六上午10:30-12:30,新概念第一册,新开班,满6人开班。

2、周六下午14:00-16:00,新概念第二册,可插班,目前上到第17课。

3、周六下午16:10-18:10,新概念第一册,可插班,目前上到第83-84课。

【注意】

1、关于廖老师新概念班级的具体详情,大家可通过下图中的地址和电话咨询。

2、大家还可以加廖老师的微信好友入群学习:xgnyy2018。

本课的重点语法是情态动词can与be able to的对比用法。

在一般现在时主动语态中表示“能、会”时,两者意义差别不大,可互换。如:

he can / is able to climb the mountain before schedule.

但在以下几种情况中,两者不能换用:

1、在词义上,can除可以表示“能、会”外,还可以表示“许可、允许”或可能性,而be able to则不行。如:

it can't be my son. he has gone to xi'an. / can i help you?

2、can一般只有现在时和过去时两种时态形式,而be able to还可以用于将来时和完成时等其它时态时。如:

i'll be able to come back in five days. / she hasn't been able to finish the job yet.

3、be able to多表示有能力或技巧做某事,一般不用于指物;而can则既可表人也可表物的能力。如:

a tiger can run faster than a motorcycle.

4、can可用于被动语态,而be able to则不能。如:

the house can't be destroyed in such a way.

本课难点部分出现了有关介词at的常用短语。如:

1、at first(起初;首先)

she'd liked him at first, but soon lost interest

2、at last(最后;终于)

look! it's snowing. winter is here at last.

3、at least(至少)

he's been away for at least a week.

4、at most(最多)

there were at most twenty people in the classroom.

5、at heart(本质上)

he was a very gentle boy at heart.

6、at times(有时)

the match took nearly three hours and was interrupted at times by rain.

7、at a loss(不知所措)

i was at a loss for what to do next

8、a once(立即)

i must be going back at once.

9、at home(在家)

last night they stayed at home and watched tv.

10、at any rate(无论如何)

at any rate, i must go on monday.

11、at present(目前)

he is at present in shanghai.

12、at school(上学)

science was never my strong point at school.

关于以上第43课讲义中的所有练习的参考答案,请加好友申请:xgnyy2018,注明是要讲义的参考答案即可。