1) 談及一項長期活動或開始一種習(xí)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 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.
一般情況下沒區(qū)別
只有三種情況只用start to do sth.
1.start本身用-ing
He is just starting to write the letter.
2.主語是物不是人
The ice started to melt.
3.其后的動詞與想法\感情有關(guān)
She started to understand it.
當然也不是太絕對的,你說的那個句子,是指開始傾盆大雨,并且一直在下,持續(xù)了一段時間.那么是不是那句話是根據(jù)意思選最符合的呢？(＞﹏＜)(ˇ?ˇ) 想～對的，有些單詞辨析題，就是根據(jù)句意來選擇的。