Lesson 76：When did you ...?（你什么时候...？）
练习
一：句子练习（动词过去时 + 日期）
1. looked at that picture
①：When did you look at that picture?
②：I looked at that picture an hour ago.
2. painted that bookcase
①：When did he paint that bookcase?
②：He painted that bookcase the year before last [year].
3. worked in an office
①：When did you work in an office?
②：I worked in an office last day.
二：动词时态转换练习（动词-->动词过去时）
例：She goes[went] to town every day.
①：She meets[met] her friends every day.
②：They drink[drank] some milk every day.
③：He swims[swam] the river every day.
④：She takes[took] him to school every day.
⑤：He cuts[cut] himself every morning.