how long...含义以及时态

How long 时态,语法问题探讨 how long 可用于各种时态吗? how long 语法,时态问题咨询 how long were you there 是什么时态,能等于什么 时态：how long do you think the meeting_(last)? How long have you been doing是什么时态的句子?这个时态怎样构成? 一句话的时态问题How long have you been stay here?请问这句话是什么时态,并且说出这种时态 how long与how soon,how ofen 各有什么含义及用法 HOW LONG~ 英语时态选择she asked the worker how long ____to build the chuech. 请问这里用什么时态,为什么?How long ____ your aunt _____(keep) this book? how long have you been like this?为什么用完成时态?请类似的举例