加ing的形式有哪幾種？怎樣用

　　1、be動詞(is.am_are).介詞后面加ing形式。
　　某些動詞后出現(xiàn)非限定性動詞時只能用動名詞作賓語，不能用不定式。常見的此類動詞有：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 onwalking and never stopped talking.
　　他們繼續(xù)走，說個不停。
　　I found it pleasant walking along the seashore.
　　在海灘上走真是樂事。
　　2、作介詞的賓語
　　We are thinking of making a new plan for the next term_
　　我們正考慮為下學(xué)期制定新的計劃。
　　Shall we have a rest or get down to doing our work?
　　我們休息呢還是開始干活？
　　3、作形容詞的賓語
　　The music is well worth listening to more than
　　once.
　　這種曲子很值得多聽幾遍。
　　We are busy preparing for the coming sports
　　meet.
　　我們正為馬上到來的運動會忙著做準(zhǔn)備。
　　4、作表語
　　動名詞作表語時句子主語常是表示無生命的事物的名詞或what引導(dǎo)的名詞性從句。表語動名詞與主語通常是對等的關(guān)系，表示主語的內(nèi)容，主語、表語可互換位置。
　　Your task is cleaning the windows.
　　你的任務(wù)就是擦窗戶。(Cleaning the windows is
　　your task.)
　　What I hate most is being laughed at.
　　我最痛恨的就是被別人嘲笑。 (Being
　　laughed at is what I hate most.)
　　5、作定語
　　動名詞作定語往往表示被修飾詞的某種用途。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

一般是直接加
以不發(fā)音的e結(jié)尾的去了e再加，如果come,have, Make,第等等
以重讀閉音節(jié)結(jié)尾的，雙寫最后一個輔音字母再加ing,如sit,begin,cut,put,等等