It can difficult to know happen为什么要在can后加be,be有什么用

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It can difficult to know happen为什么要在can后加be,be有什么用

It can difficult to know happen为什么要在can后加be,be有什么用
It can difficult to know happen
为什么要在can后加be,be有什么用

It can difficult to know happen为什么要在can后加be,be有什么用
can 是情态动词,后面跟动词原形,而difficult 是形容词,所以必须在difficult 前必须加be .
be 作系动词,difficult 是表语,构成系表结构.

这是一个句型,it can be+verb.
Example: it can be extremely tough for u to finish this task in such a short period.

can是情态动词,difficult是形容词,要在它之前加上be动词,才能构成系表结构。
楼下的说的更明白,推荐哦!

smog can also make it difficult for some people____A breathingB to be breathedC breatheD to breathe find it difficult to do, It's difficult to choose! Chinese is _____(difficult) for Dave to learn.He can't understand it. 请问哪里错了It can be difficult to learn Tibetan. 英语翻译This arbitrariness sometimes can make it difficult to bring back the word. You can find ( ) difficult to learn English well.A.that B.this C.it D.how it is too difficult to communicate since you can not know English i can't speak German .so it is very difficult to make myself u__in Germany It can difficult to know happen为什么要在can后加be,be有什么用 parents found it is difficult/it difficult/it was difficult to teach children.说明选择原因 写出同义句 the problem is too difficult for ue to solve.the problem is difficult we can,t solve it.the problem easy for us to solve. can you think of a ______ to this difficult problem?i don't know how to deal with it. Because we like different kinds of movies, it can be difficult to choose one to see.意思 It's very difficult to learn English well,but you can't___.a.put it up b.take it up c.look it up d.give it up This problem is so difficult that nobody can work it out.(保持原意)This problem is ( ) difficult for ( ) to work out.填too...anyone可以吗? The math problem is too difficult for him to work out.(写出同义句)The math problem is _____ difficult _____ he can't work it out. Unit 3 is too difficult for him to understand.(同义句) Unit 3 is ( )difficult ( )he can not我写在下面了:understand it