be sure (確信)的用法：

記住幾個結構： ①be sure of (sth); ②be sure to(do); ③be sure that+從句。如：She told me many times that she was sure to come.(她給我講過多次她一定會來的) / Are you sure of your answer?Maybe it’s wrong.(你對你的答案有把握嗎?也許是錯的。)/ I am sure that Dad will help me with the job.(我確信爸爸會幫著我做這件事情的)

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