【—輔導(dǎo)之動詞ing和帶to不定式作主語】下面是對動詞ing和帶to不定式作主語語法的講解，同學(xué)們認真學(xué)習(xí)。

　　動詞ing和帶to不定式作主語：

　　To be a teacher is my dream. Working hard brings you success.

　　Taking care of our environment is very important. To plant trees makes me happy.

　　Reading books gives you knowledge. (以上各句謂語都用單數(shù)，見黑體部分)

　　Listening and writing are both difficult. (此句主語因指兩件事，謂語用復(fù)數(shù))

　　18.later / after / ago / before: 1later“…時間后”結(jié)構(gòu)：時間段+later

　　常用于一般過去時。They went to Beijing five days later.

　　(later前無時間段，單獨在句尾，常用于將來時：I’ll see you later.)

　　2after“…時間后”結(jié)構(gòu)：after+時間段，常用于一般過去時，和1相同。

　　They went to Beijing after five days. The dog died after a week.

　　(after也可加句子, 但主句不一定用一般過去時：I’ll send you an e-mail after I get home.

　　Return it to me after you finish it. 見2.)

　　3ago“…時間前”結(jié)構(gòu)：時間段+ago, 用于一般過去時。

　　The Greens moved to Shanghai 初中數(shù)學(xué) four weeks ago. I saw it ten minutes ago.

　　(若有since+時間段+ago，常用現(xiàn)在完成時：Mr. Li has worked here since 5 years ago.)

　　4before 單獨放在句尾，常用現(xiàn)在完成時：“以前”

　　I have been to London before. He has seen the film before.

　　(若是時間段+before,常用過去完成時，“…前”： I had seen the film two weeks before. We had found out the answer to the problem an hour before.)

　　希望以上對動詞ing和帶to不定式作主語語法的講解，能很好的幫助同學(xué)們對的掌握，希望同學(xué)們在考試中取得好成績。

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