What do you think about it?和What do you think of it?的意思分别是什么

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think about 考虑（人或事）
如：He is thinking about a math problem.
think of 考虑到,想到,认为
如：What do you think of this film?
=How do you like this film ?(你认为这部电影怎么样?）
think over仔细、认真考虑
如：Think it over,and you will work it out.
注：What do you think about it?这个句子是错的,去掉it)
祝你进步!