A been
C has been in
have read
has gone
He's been here for less than an hour.
He came here less than an hour ago.
B never那个--理由----或说多种时态混在一起的怎么做啊？这单元刚刚学了现在完成时，糊里糊涂的，到底怎么判断呢？动作持续到现在或对现在有影响的用现在完成时；有明确的表示过去的时间状语，用一般过去时。把定义记住，再多练习，没问题的，一定行！加油！再请教一题My father __Shanghai twice.a,has been to b,has been inc. has gone tod.has gone inA has been to我爸爸去过上海两次。（去了已经回来用：have/has been to；去了还没有回来用：have/has gone to）没有has gone in的用法；has been in 意思不一样，表示人在上海祝你学习进步！及时采纳喔！