[情态动词had batter]情态动词：had better表示
【shitiku.jxxyjl.com--英语语法词汇】
had better 相当于一个助动词，它只有一种形式，它后面要跟动词原形。had better do sth
had better not do sth
it is pretty cold. you"d better put on my coat.
she"d better not play with the dog.
had better have done sth表示与事实相反的结果，意为"本来最好"。
you had better have come earlier.
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[一般现在时代替将来时的情况]一般现在时代替将来时详细阅读
时间状语从句，条件句中，从句用一般现在时代替将来时when, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, th...
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only放句首要倒装吗|only在句首要倒装的情况详细阅读
only in this way, can you learn english well only after being asked three times did he come to the meeting 如果句子为主从复合句，则主句倒装，从句不倒装 only when he is...
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[比较until和till]比较until和till详细阅读
此两个连词意义相同。肯定形式表示的意思是做某事直至某时，动词必须是延续性的。否定形式表达的意思是直至某时才做某事。动词为延续性或非延续性都可 以。 正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。 肯定句： i slept until midnight 我一直...
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现在完成时的三种句型_用于现在完成时的句型详细阅读
1）it is the first second time… that…结构中的从句部分，用现在完成时。 it is the first time that i have visited the city it was the third time that...
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部分倒装的_其他部分倒装详细阅读
1) so… that 句型中的so 位于句首时，需倒装。 so frightened was he that he did not dare to move an inch 2) 在某些表示祝愿的句型中： may you all be happy 3) 在虚拟语气条件句中...
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语法填空特殊词变化归纳|语法-特殊词精讲详细阅读
7 动词不定式 7 1 不定式作宾语1) 动词+ 不定式 afford aim appear agree arrange ask be decide bother care choose come dare demand desire dete...
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特殊词精讲|特殊词精讲：try doing/to do详细阅读
try to do 努力，企图做某事。 try doing 试验，试着做某事。you must try to be more careful 你可要多加小心。i tried gardening but didnt succeed 我试着种果木花卉，但未成功。...
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[动词不定式和介词to的区别]动词不定式：用作介词的to详细阅读
to 有两种用法： 一为不定式+动词原形； 一为介词+名词 动名词, to 在下面的用法中是第二种，即to+ 名词 动名词：admit to承认， confess to承认，be accustomed to 习惯于， be used to 习惯于， stick to 坚持，...
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【虚拟语气need have done】虚拟语气：need "不必做"和"本不该做"详细阅读
didnt need to do表示： 过去不必做某事, 事实上也没做。 neednt have done表示： 过去不必做某事, 但事实上做了。 john went to the station with the car to meet mary, so she didnt need to...
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[比较while与do-while循环的异同之处]比较while, when, as详细阅读
1）as, when 引导短暂性动作的动词。 just as just when when i stopped my car, a man came up to me 2）当从句的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或 while。 when you...