Question

英语选择题(又追加!!)

1.Fibers of hair and wool are not continuous and must normally be spun into thread____ woven into textile fabcrics.
when to be/if they are to be

2.The ambassador heard that ____ at his ppost a year longer.
he be staying /he would be staying

3.—what do you think of the boxing match last night?
——I really ___ think Jackson _____
don't... has won/didn't ... would win

4.great efforts to increase agricultureal production must be made if food shortage ___ avoid.
is to be/can be/will be/has been
请附上解析，谢谢

Answer 1

1、when to be 这是非常简洁的用法。
2、he would be staying 他听见别人说时，应当是"You will be staying", 转述时，自然变成"would"。
3、didn't ... would win 问句虽然是用现在时态，但回答时用的是昨晚的想法。用don't 本无不可，但后面用has won显然不通。
4、is to be 这里用的被动式，相当于“如果要避免食物短缺”，to be 的意思是比较强烈的。其他三个都不合适。在if后面，will be和has been的时态不对，can be的意思不当。

追问

谢谢，课第一题答案选的是第二个，困惑中

追答

从语法上讲，第一种并无不对。但if they are to be的强调意味更浓，译成中文，有如下差别：
if they are to be：如果要将它们织成纺织品的话。
when to be：当它们织成纺织品时。

Answer 2

1.if they are to be
2.he would be staying
根据heard，后面从句应该相应用过去时态，所以用将来过去时
3.didn't ... would win
虚拟句
我真的没有想到Jackson会赢
4.is to be/

Answer 3

第二题选第二个，第三题选第二个。其他不确定

追问

恩，谢谢，能解释一下第三题吗，问句就是do，回答为什么不可以是do 表示现在认为？

追答

——你怎么看待昨天的拳击比赛？
——昨天我真的不认为Jackson会赢。（他谈的是昨天的感受，是过去式）

Answer 4

1when to be 2 he would be staying 3don't... has won 4 is to be

追问

能麻烦解释一下第二题和第四题吗？谢谢
2。 he (should) be staying 这样不可以吗
4. 这个让我很困惑，没有头绪啊，