作业帮情态动词运用
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/21 18:40:33
老师！！！就拿这样的题来说，什么could、would、may、should、had等等这些词的用法我都分不清楚，该怎么判断哪里要用哪个词呢？？ If we throw too much waste and can't keep good ecosytem ,we___our future A、must have destroyed B、could be destroying C、may be destroying D、must destroy _____harder on his science project,he would win the first prize in the competition to be held in Beijing. A、Would he work B、Should he work C、Had he work D、Did he work
解题思路： 见下
解题过程：
情态动词的各个用法需要你逐一记忆，并且多做题来熟练。尽管刚接触很乱，各个理顺一下就好了。
Could：过去时态的“能够”；否定句和疑问句的“可能性”；疑问句中的客气语气“可不可以……”
He said he could speak English。
He couldn't be there。 他不可能在那。
Could you tell me his address?
Would: 过去将来时 “将”；过去时态的“常常”；疑问句中表示客气“可不可以……”
They told us that they would arrive after two days.
Whenever he had difficulty, he would come to me. 无论他什么时候有困难，总会来找我。
Would you give me some advice？
May：表示允许“可以”；肯定句和否定句表示可能性“有可能；可能不”；表示可能性疑问句中表示客气“可不可以……”
You may leave。 你可以走了
They may have got there。 他们可能已经到那里了。
May i come in？
Should： 应该；差不多会；竟然会
Had不是情态动词，是助动词，构成过去完成时的。
来看题吧：
If we throw too much waste and can't keep good ecosytem ,we___our future
A、must have destroyed B、could be destroying
C、may be destroying D、must destroy
答案C
题意：如果我们仍太多的垃圾无法保持好的生态，我们可能正在毁掉大自然。
Must：必须；肯定是
Could用于疑问句和否定句的“可能”
_____harder on his science project,he would win the first prize in the competition to be held in Beijing.
A、Would he work B、Should he work C、Had he work D、Did he work
答案：B
这是虚拟条件句，而且采用了省略if部分倒装的形式，正常的形式是：
If he should work harder on his science project,he would win the first prize in the competition to be held in Beijing.
这是与将来相反的条件句，要求if +should do/were to do/动词的过去式，主句是“主语+would/could/should do
这个结构也需要你记住！
如对本题解答还有疑问，可在“继续讨论”中留言，我收到后会尽快给你答复。谢谢你的配合！匆忙中难免有疏漏，请多包涵哦。我是石老师，随时为你答疑解惑!
最终答案：略
解题过程：
情态动词的各个用法需要你逐一记忆，并且多做题来熟练。尽管刚接触很乱，各个理顺一下就好了。
Could：过去时态的“能够”；否定句和疑问句的“可能性”；疑问句中的客气语气“可不可以……”
He said he could speak English。
He couldn't be there。 他不可能在那。
Could you tell me his address?
Would: 过去将来时 “将”；过去时态的“常常”；疑问句中表示客气“可不可以……”
They told us that they would arrive after two days.
Whenever he had difficulty, he would come to me. 无论他什么时候有困难，总会来找我。
Would you give me some advice？
May：表示允许“可以”；肯定句和否定句表示可能性“有可能；可能不”；表示可能性疑问句中表示客气“可不可以……”
You may leave。 你可以走了
They may have got there。 他们可能已经到那里了。
May i come in？
Should： 应该；差不多会；竟然会
Had不是情态动词，是助动词，构成过去完成时的。
来看题吧：
If we throw too much waste and can't keep good ecosytem ,we___our future
A、must have destroyed B、could be destroying
C、may be destroying D、must destroy
答案C
题意：如果我们仍太多的垃圾无法保持好的生态，我们可能正在毁掉大自然。
Must：必须；肯定是
Could用于疑问句和否定句的“可能”
_____harder on his science project,he would win the first prize in the competition to be held in Beijing.
A、Would he work B、Should he work C、Had he work D、Did he work
答案：B
这是虚拟条件句，而且采用了省略if部分倒装的形式，正常的形式是：
If he should work harder on his science project,he would win the first prize in the competition to be held in Beijing.
这是与将来相反的条件句，要求if +should do/were to do/动词的过去式，主句是“主语+would/could/should do
这个结构也需要你记住！
如对本题解答还有疑问，可在“继续讨论”中留言，我收到后会尽快给你答复。谢谢你的配合！匆忙中难免有疏漏，请多包涵哦。我是石老师，随时为你答疑解惑!
最终答案：略