现在过去时什么时候用 HAVE BEEN TO/和HAVE BEEN IN?重点在于这两个介词里!如何分辨!
do you know where TOM is?
he must have been in SHANHAI.
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他去伦敦了
he has gone to LONDON.
他去伦敦三个月了
he has been in Landon for three months
如果按照下面两个句子分别的话,应该是有时间状语就用IN 那么上面的句子如何解释呢?
究竟如何分别何时用in或to呀?