帮我讲一下这个简单的语法我喜欢在海里游泳I enjoy swimming in the sea 1enjoy后面有动词必须加动词"ing"形式都有哪些单词后面动词必须用“ing"的?2祈使句必须用动词原形,还有to后面+动词也必须用

帮我讲一下这个简单的语法我喜欢在海里游泳I enjoy swimming in the sea 1enjoy后面有动词必须加动词"ing"形式都有哪些单词后面动词必须用“ing"的?2祈使句必须用动词原形,还有to后面+动词也必须用
帮我讲一下这个简单的语法
我喜欢在海里游泳
I enjoy swimming in the sea
1enjoy后面有动词必须加动词"ing"形式
都有哪些单词后面动词必须用“ing"的?
2祈使句必须用动词原形,还有to后面+动词也必须用原形.
还有哪些情况下必须用动词原形吗?
这两个问题我想知道,请帮我详细的讲一下.谢谢!

帮我讲一下这个简单的语法我喜欢在海里游泳I enjoy swimming in the sea 1enjoy后面有动词必须加动词"ing"形式都有哪些单词后面动词必须用“ing"的?2祈使句必须用动词原形,还有to后面+动词也必须用
be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,imagine,include,keep,keep on,mind,miss,put off,delay,practise,resist,suggest,depend on,think about,set about,succeed in,worry about,burst out,insist on,can’t stand,be used to,get used to,devote…to…,look forward to,pay attention to,get down to等.如：
They went on walking and never stopped talking.他们继续走,说个不停.
I found it pleasant walking along the seashore.在海滩上走真是乐事.
（2）作介词的宾语
We are thinking of making a new plan for the next term.我们正考虑为下学期制定新的计划.
Shall we have a rest or get down to doing our work?我们休息呢还是开始干活?
（3）作形容词的宾语
The music is well worth listening to more than once.这种曲子很值得多听几遍.
We are busy preparing for the coming sports meet.我们正为马上到来的运动会忙着做准备.
3、作表语
动名词作表语时句子主语常是表示无生命的事物的名词或what引导的名词性从句.表语动名词与主语通常是对等的关系,表示主语的内容,主语、表语可互换位置.
Your task is cleaning the windows.你的任务就是擦窗户.(Cleaning the windows is your task.)
What I hate most is being laughed at.我最痛恨的就是被别人嘲笑.(Being laughed at is what I hate most.)
4、作定语
动名词作定语往往表示被修饰词的某种用途.如：
a walking stick ＝a stick for walking=a stick which is used for walking
a washing machine=a machine for washing=a machine which is used for washing
a reading room=a room for reading=a room which is used for reading
a measuring tape=a tape for measuring=a tape which is used for measuring
sleeping pills=pills for sleeping=pills which is used for sleeping
加原形:
情态动词和助动词等,如:
can,could,may,should,might,must,ought,need,have,let,make,help sb+do sth.
2.加不定式
want,would like,like,love,be going to,go on,hate,begin,continue,start,ask,tell,afford,agree,aim,appear,arrange,believe,care,choose,claim,come,consent,dare,decide,demand,desire,determine,decline,expect,elect,fail,offer,happen,seem,refuse,wait,pretend,promise,wish,hope,mean,long,learn,seek,intend,tend,manage,prepare,remember,forget,plan
3.可以用于”动词＋宾语＋不定式”的词．(即:v.+sb/sth+to do)
advise,allow,appoint,believe,cause,compel,consider,drive,get,guess,invite,judge,know,report,select,state,trust,intend,say,teach,want,beg,warn,expect,intend,pretend,understand,order,send,remind,judge,like,find,force,forbid,encourage
4.加ing
start/begin/keep/feel like /practice/like/allowed/pay attention to /be used to/consider +doing sth.(所有介词后面都加doing sth.)
see/hear/find/watch sb.doing sth
keep/prevent/stop+from doing sth

1.后加-ing的动词太多了，比如finish doing, practise doing, keep doing...
2.Why not +动词原形，为什么不...呢？表示建议，如：
Why not come to my home for dinner?

1、仅带动名词作宾语的动词为：admit appreciate avoid delay enjoy escape prevent finish imagine mind practise resist risk suggest stand forgive keep allow advise permit forbid 等，
...

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1、仅带动名词作宾语的动词为：admit appreciate avoid delay enjoy escape prevent finish imagine mind practise resist risk suggest stand forgive keep allow advise permit forbid 等，
注意：
1）但如果在 allow advise permit forbid 后提到有关的人，就只能用不定式作宾补。
2）在动词 want, need, require, demand 等词后加动名词作宾语时表示被动意义，也可以用 to be done。
2、除了祈使句必须用动词原形，to后面+动词用原形外，还有很多情况要用动词原形，比如助动词后也要用动词原形，另外还有：
1)but/except前面的句子中有动词do的形式出现时，but/except后用动词原形，如： I have nothing to do but wait.
2)有些动词后面用动词原形，即不带to的不定式作宾补，如let,make,see,hear,observe,feel,watch等。

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