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帮我讲一下这个简单的语法

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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
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,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