Question

高中英语选择题，需要详细的解释，谢谢！

1._____in the mountain for almost a week,the two students were finally saved by the local people
A.Having lost B.Lost C.Being lost D.Losing

2.Many birds were seen_____along the river and a lot of monkeys_____up and down when we arrived there.
A.fly;jump B.flying;jumping C.fly jumping D.flying;jump

Answer 1

这些都是非谓语动词的应用。看来，老师讲过了，需要你们通过练习再次熟悉一下。
1）Having lost in ...(选A)
这是现在分词的完成形式，表示这个动作发生在先，主句的动作发生在后。
现在分词这么用是为了给主句充当时间状语。为了分清谁先谁后，先发生的旧用完成形式。（这个比较书面化）

也可以用过去完成时态表达同样的意思：The two students were finally saved ...after they had lost in the mountain for ...(这个比较口语化)

2）觉得应该选B。因为这是‘被看见正在做什么’的意思，所以，后面的动词要用-ing形式。后面的填空被省略了，经过还原，就是：
Many birds were seen flying along the river and a lot of monkeys were seen jumping up and down when ...

Answer 2

B
首先你要清楚：迷路了是be lost用于被动
而A D均为主动语态，所以排除
而C是指正在被丢，翻译不通吧……
所以选B

只是一道高考题，很经典，我当时也做错了

B
这句话译为当我们到那的时候，我们看见了鸟儿和猴子在做…………
并非看见全过程，而是局部一个场面。
and前后便并列顺承
所以选B。

希望我可以帮到你.

Answer 3

C.Being lost

D.flying;jump

Answer 4

A D