Unit 4 Lesson 21 Christmas Cards课件（21张）.ppt
Unit 4 Christmas
(Lesson 21)
快速说出动词的过去式
clean
cleaned
stayed
washed
eat
hurt
ride
wash
watch
watched
bought
hurt
rode
ate
buy
stay
do
did
Q1: What can you see in the picture?
Q2: Who are they?
be going to do ..
表示打算/将要做……，用于将来时态。
be 有三种形式：am, is, are，随着主语变化而变化。该句主语是we,所以...