1動(dòng)詞加ing做謂語情況
做謂語時(shí)動(dòng)詞加ing前面必須加上be動(dòng)詞,形成be+動(dòng)詞ing(現(xiàn)在分詞)作句子謂語，構(gòu)成進(jìn)行時(shí)態(tài)句子。例如:He is reading a book now.他正在看書.He was watching TV when his mother came in.他媽媽進(jìn)來時(shí)，他正在看電視。
They've been waiting for you for three hours.他們等你三個(gè)小時(shí)了.
2動(dòng)詞加ing做非謂語情況1、動(dòng)詞作介詞的賓語要加ing(動(dòng)名詞)I'm looking forward to seeing you again.我期盼著再次見到你.The boy is so excited about hearing from his mother.男孩為收到他媽媽的來信很興奮。2、部分動(dòng)詞用動(dòng)詞做賓語。做賓語的動(dòng)詞要加ing(動(dòng)名詞)I Practising speaking English Every day.我每天練習(xí)說英語.
Could you mind opening the door?你介意開門嗎?
I have finished reading three books.我已經(jīng)看完三本書.
The old man Enjoys living in the country.這老人喜歡住在農(nóng)村.
3、一些固定句式后面要加動(dòng)詞ing(現(xiàn)在分詞)We have fun Playing in the park on Sunday.Most students have problems speaking English.4、動(dòng)詞修飾名詞做后置定語時(shí)，要加ing(現(xiàn)在分詞)There is a boy Crying over there.I felt something moving in the house.I heard someone singing in the next room.
5、動(dòng)詞做主語和表語時(shí)，動(dòng)詞要加ing(動(dòng)名詞)Swimming is very popular in summer.His job is teaching English.
綜上所述，動(dòng)詞在以上六種情況需要加ing!
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