是形容词，多用在闭动词，is，are后面。表示“重要”的意思。前面也常加“very"来修饰，表示非常重要、例如：They are very important.也经常用it is 加 very. important for sb 表示对某人来说什么事情很重要、
形容词
somebody/something is important (for somebody).
an important XXX
...之类~
an important factor .
It's important( for me) to do ...
It's important that he should attend every day.
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