一般情况下，两者可以互换。如：He started learning /to learn English when he was only three. 他在只有三岁的时候就开始学习英语了。但在下列三种情况下，只能用start to do sth.(1)当主语是物而不是人时。如：The ice started to melt. 冰开始融化。 （2）当start用于进行时态时。如:She is starting to cook the dinner. 她开始做饭（3）当start后面的非谓语动词指心理状态或精神活动（即表示想法、 意见等的词，如think, realize, wonder, understand等）时。如：She started to wonder who had done it. 她开始想是谁做了这件事。
开始做某事start doing sth begin to do sthtake up If you take up a job, you begin to work at it. 开始工作set about one's work 着手(或开始)工作对某人大声喊叫 shout at sb. loudly对某人大声嚷嚷 yell at sb loudly希望能帮到你，望采纳
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