***NOT A TEACHER***
Nguyet from Vietnam:
Question: I would like to know what is different between "start doing " and "start to do".
Answer: And Nguyet your question is about a verb which takes both patterns and there is no difference in meaning. The verb 'start'. You can say 'start to do' and 'start doing', for example "Last year I started learning Chinese" or, "Last year I started to learn Chinese." Both are correct and both have the same meaning. Some native speakers may prefer one form over the other, but this will be for regional or personal reasons.
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