现在进行时态的复习，着重复习了动词的变化规则，以及现在进行时态的肯定句、否定句、一般疑问句等。
句型转换口诀：
肯变否：be 后+not ;
肯变疑：be 提前，句号变问号，I/we 变 you, my/our 变 your，一二人称互换。
精选了部分题目：
1．My mother is __________ (cook / cooking) Chinese food now.
2．John ___________ (is watching / watching) TV now.
3．Listen! The boy ________ (sing／is singing) in his room．
4．Look! They are ____________ (playing / play) with the toy cars.
5．I'm ________ (putting / putting) on my winter coat.
6. Daming is ________ (swim / swimming) in the sea.
7．Look! My mother is _____________ (cook / cooking) food.
8．Look! Amy _____________ (is doing / does) morning exercises.
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