摘要:3. 一般过去时及used to 的用法 [例] (1)I stayed there for two days. 我在那儿住了两天. (2)Tom joined the army in 1994. 汤姆1994年参了军. (3)We used to swim every day. 我们曾每天游泳. (4)They used to have four meals a day. 他们过去每天吃四餐.

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