梦幻西游飞行技能书:---how long ___ each other before they ___ married ?

来源：百度文库 编辑：中科新闻网 时间：2024/05/15 01:21:09
---how long ___ each other before they ___ married ?
--- For about a year.
a.have they known ; get b. had they known ; got
为什么要用b不用a 怎么理解的？

都是过去发生的动作，但“认识”是在“结婚”之前，要用过去完成时态。

先填第二空，因为他们已经结婚了，故用过去式got
再回过头来看第一空，因为第二空为过去式got，故
第一空用过去完成时态had known （抓住时态一致解题）

过去完成时的用发法，before 为标志

因为他们相互认识是在他们结婚之前 所以用过去完成时“had”

b

---how long ___ each other before they ___ married ? #29. How long ago ___ the shoes ___ (buy) How long do u spent each day using computer? How long would u spent each day using computer? In boxing, how long does each round last? How Come How Long 是什么意思 ？？ how far 和how long 的区别? how soon和how long的区别？ how long和how soon的区别? How long is a shoe ?