【句子】

Long before children are able to speak or understand a language, they communicate through facial expressions and by making noises.



儿童在能说或能听懂语言之前，很久就会通过面部表情和靠发出噪声来与人交流了。



【解析】



1.before long 和long before 的区别:



before long 不久以后，很快;long before 很久以前



①They came back before long.

他们很快就回来了。

②I knew Tom long before I knew you.

我在认识你之前很久就认识了汤姆。

2.be able to与can的区别：



1)be able to 强调通过努力而获得的能力，而can则强调自身已具有的能力。

①She can sing the song in English.

她能用英语唱这首歌。

②He will be able to sing this song in English in a few minutes, too.

几小时之后，他也能用英语唱这首歌。

2)be able to 强调一种结果，而can只强调一种可能。



①Luckily, he was able to escape from the big fire in the end.

幸运的是，他终于逃出了大火。

②If he got here a few hours earlier, I could save him.

要是他早几小时来，我还能救他。

3)be able to 可以有各种时态；而can只有一般现在和一般过去两种时态。

①He is / was / will be able to help you.

他能帮你的忙。

②I could help you last night, but you didn’t come.

昨天晚上我能帮你，而你又没来。

4) can可用于表示可能性，推测，允许等情况，而be able to通常不这样用。

①You are able to use my pen. (误)

②You can use my pen. (正)

5)can有被动语态，主语为人或物皆可，而be able to只接不定式的主动形式，不接表示被动的不定式，也不可用无生命的名词作主语。



①The work is able to be done by him. （误）

②He is able to do the work.（正）

注意：指过去某时或某个时刻设法做成某事，不用could,而用was\were able to。

I talked with her for a long time,and eventually I was able to make her believe me.

我谈了很久，最终还是使她相信了我的话。

3.facial n.面部护理；美容 a.面部的



①She is having a facial massage.

她正做脸部按摩。

②I've made an appointment for a facial next week.

我已经预约了下周去美容。

4.expression n. 表情，表示，表达，词句，措辞，表现



【近义词】

face n.表面,脸;v.面对,面向 look v.看,寻找;n.看,样子

manifestation n.表现,示威运动 saying n. 谚语,俗话;动词

communication n.交流,通讯appearance n.出现,露面

countenance n.面容,面部表情;v.赞.. phrase n.短语,习语;vt.措词...

idiom n.成语,惯用语term n.学期,术语;vt.把 ...

①He had a passive expression on his face.

他脸上有一种漠然的表情。

②The scenery was beautiful beyond expression.

那风景美丽得无法形容。