文档介绍：高中英语语法知识点总结
英语语法是学习英语的重中之重，也是考试涉及知识点较多的一部分，所以我们一定要学好语法。以下是我整理的高中英语语法知识点归纳及总结，供大家参考。
【一】 形式主语常用句型结构
+ be +名词+ that从句
It is a pity that we won't be able to go to the south to spend our summer vacation.
+ be +形容词+ that从句
It is very likely that they will hold a meeting.
+动词的过去分词+ that从句
It is known to all that the gun powder was first invented by the Chinese.
、要求、命令等意义的被动结构中that从句中的谓语动词常用should do虚拟语气。
It is suggested requested, proposed, desired, etc. that…
It is suggested that the work should be done with great care.
【二】高中英语语法知识点归纳
1】情态动词的语法特征
，只表示期待或估计某事的发生。
除 ought 和 have 外，后面只能接不带 to 的不定式。
，数的变化，即情态动词第三人称单数不加-s。
，即没有不定式，分词等形式。
2】比较 can 和 be able to
1. can could 表示能力，可能 过去时用 could, 只用于现在式和过去式could。be able to 可以用于各种时态。
They will be able to tell you the news soon. 他很快就能告诉你消息了。
be able to的情况。
。
。
。
。
，只能用 was/were able to， 不能用 could。
He was able to flee Europe before the war broke out.
= He managed to flee Europe before the war broke out.
注意：could 不表示时态
could。如：
Could I have the television on?--- Yes, you can. / No