My uncle used to (smoking) when he was yound.

问题描述:

My uncle used to (smoking) when he was yound.

smoke

答案:My uncle used to 【smoke】when he was yound.

翻译:我的叔叔年轻时经常抽烟。

语法:used to do sth 翻译为过去常常做某事。

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smoke
used to do 表示过去常常做某事,而现在往往不做了