8． ★ happen to do sth. 碰巧正在做某事 when I was about to look for him, he happened to come in. 用法拓展: (1) happen to be doing 碰巧正在做某事 (2)happen to have done 碰巧做完了某事 (4) happen to sb. / sth .发生 (5) It happens that = 主语+ happen + to do 碰巧--. (6) As it happens 碰巧,偶然 It happened that I met him on my way home, yesterday. = I happened to meet him on my way home, yesterday. 【
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