特黄特色三级在线观看免费,看黄色片子免费,色综合久,欧美在线视频看看,高潮胡言乱语对白刺激国产,伊人网成人,中文字幕亚洲一碰就硬老熟妇

8.11 begin(start) doing/to do
?
  begin / start to do sth
  begin / start doing sth.

1) 談及一項長期活動或開始一種習慣時,使用doing.
  How old were you when you first started playing the piano?
  你幾歲時開始彈鋼琴?
2) begin, start用進行時時,后面動詞用不定式to do
   I was beginning to get angry。
   我開始生起氣來。
3) 在attempt, intend, begin, start 后接know, understand, realize這類動詞時,常用不定式to do。
   I begin to understand the truth。
   我開始明白真相。
4) 物作主語時
   It began to melt.











 學習啦--英語語法大全