e动词(is.am.are).介词后面加ing形式.还有固定的词组搭配要记住某些动词后出现非限定性动词时只能用动名词作宾语,不能用不定式.常见的此类动词有：advise, allow, permit, avoid, consider, enjoy, finish, give up, cannot help, imagi
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would like sth. 想要(...like后接动词时,只能用其不定式形式,不可用V-ing形
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there be 后面不加动词,加名词,表示某地有某物,若有动词应该是原形.例：There is an apple on the table.桌子上有一个苹果.there are some students on the square.广场上有一些学生.
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like是动词,动词后面不能再加动词,而应该加动词ing形式或不定式；动词ing：like doing sth.喜欢做某事（长期的）不定式：like to do sth.喜欢做某事（短暂的）
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后面跟名词或者是不定式例句：I would like you to find out about it.我希望你们能找出和它相关的东西.I would like to cash this check, please.麻烦你,我想把这张支票换成现金
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常用一般现在时,often,always等后动词第三人称加s,其余用原形.
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I don't like后面可以加两种形式的,一种是to do一种是doing,两者的区别很小,doing是习惯性的,而to do是即兴的,一次的.有时也可认为是通用的至于加动词原型的,应该是错的
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put one's heart into +名词/动名词
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是的,在do作动词,后面的ing形式作名词的时候.
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如果是从句的话,要看情况（假设if引导的从句在前）：前面一般比后面的早一个时态,前面是一般现在是,后面可以用将来时（If I'm better tomorrow,I will go to school.）.许多时候用以表示虚拟语气时候,若前面用had done 后面用should/would have done的形式,
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think + to do sth.但这种用法很少见的.要注意词义：1、= to expect to do sth.e.g.I didn't think to meet you here.= I didn't expect to meet you here.没有料到2.= to remember or to plan
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often是频率副词,和sometimes,always,never,frequently等一样表示习惯性.后接动词原形用于一般现在时.后接动词过去式用于一般过去时.例如：I often go to the library on Sundays.我经常星期天去图书馆.I sometimes went the park
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about 在how about 和What about 中是介词,后跟动名词,所以加Ving what about something to drink?动词不定式表目的:喝些东西怎么样呀 你
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e look forward to doing sth
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have sent具体语境具体分析,不能千篇一律的说是什么时态
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sit down属于动词短语,表示坐下的意思,sit down to do sth,表示做下去干什么事.
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