_Tom ever _(be) to China before?
问题描述:
_Tom ever _(be) to China before?
答
Has beenWhy?before指此前。过去发生持续到现在,用现在完成时。
_Tom ever _(be) to China before?
Has beenWhy?before指此前。过去发生持续到现在,用现在完成时。