begin(start) doing/to do

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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，後面動詞用不定式to do 　　I was beginning to get angry。 　　我開始生起氣來。 3)　在attempt, intend, begin, start 後接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.