英语词组中的代词it有时放中间,有时放后面怎么区分?如go over it 请举几个例子解释一下我很需要

英语词组不少是由动词+介词构成的,如：look after,think about; 这类动词短语后直接接宾语,如：Her job is to look after children in the nursery.They have a baby,and they look after her carefully.They will t...