作业帮be up to do 还是 be up doing 哪个对
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be up to do 还是 be up doing 哪个对
be up to do 还是 be up doing 哪个对
be up to do 还是 be up doing 哪个对
（1）没有be up to do这种说法.
（2）be up to doing sth. （体力或智力上）能胜任：I'm not up to going to work today.今天我不能去上班.（可能是身体不舒服.）
（3）be up to sth. （体力或智力上）能胜任：He is not up to the job.他无法胜任这项工作.
（4）be up to sb 是……的职责（或责任）,由……决定.
（5）It is up to you是上面这个短语的具体化,意思是“是你的职责（或责任）”,“由你决定”.
（6）It is up to sb to do sth.是be up to sb的扩展,意思是“做某事是……的职责（或责任）”,“要不要做某事由某人决定”.
第一个句子的句型是：
It is up to sb. to do sth. 做..取决于..
第二个句型是错误的，没有。
be up to
胜任；该由…负责；轮到…；从事，忙于
be up to do 还是 be up doing 哪个对
be up to do something
是be up to sb to do还是doing?
be up to speed
be booked up to
be up to 94%
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to be grow up is to be
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用be up to造句
be up to one's
be up to sb’s
be up to是什么意思啊?
to be up for和be up for的区别
What do you want to be when you grow up?这里为什么要用to be?
be up to do be up to doing be up to sb to do sth it is up to you 他们之间有何区别?哪be up to doing be up to do 有忙于做某事的意思么
It must be terrible to be grown up!grown up与grow up有什么区别