Sally：萨莉
What is Sally/Tim doing? What are they doing?
Are they climbing the tree?
Is she sitting under the tree?
The dog is/is not running after the cat?
Is the dog running after the cat?
Yes, it is. /No, it isn't.
now 现在进行时
[课文]
Where's Sally, Jack?
She's in the garden, Jean.
What's the doing?
She's sitting under the tree.
Is Tim in the garden, too?
Yes, he is.
He's climbing the tree.
I beg your pardon?
Who's climbing the tree?
Tim is.
What about the dog?
The dog's in the garden, too.
It's running across the grass.
It's running after a cat.
Where is the dog?
In the garden.
What is the dog doing?
It's running after a cat.
It's running across the grass.
How many children?
Who are they?
Tim and Sally.
Where are they now?
tree
What is Sally doing?
What is Tim doing?
She isn't climbing the tree.
Is she sitting under the tree.
Yes, she is.
What is she doing?
Tim is in the garden, too.
He isn't sitting under the tree.
Is he climbing the tree?
Yes, he is.
What is he doing?
The dog isn't climbing the tree.
Is it running after a cat?
Yes, it is.
What is the dog doing?
（树叶） on the tree
（人） in the tree
what about + n.
+ v.-ing?
What about an apple?
What about some milk?
what about a glass of beer?
介词后面 + 动词的-ing形式
drink：喝水
drink a glass of beer
What about (drinking) a glass of beer?