They're standing beside a lake.
换成一般疑问句和特殊疑问句
Are they standing beside a lake?
What are they standing beside
Where are they standing
The man is throwing a stick into the water.换成一般疑问句和特殊疑问句
Is the man throwing a stick into the water?
What is the throwing into the water?
Where is the man throwing a stick
We're eating our breakfast at school.换成一般疑问句和特殊疑问句
Are you eating your breakfast at school?
What are you eating at school?
Where are you eating your breakfast
Mary and tom are doing their homework at home.
换成一般疑问句和特殊疑问句
Are Mary and Tom doing their homework at home?
What are Mary and Tom doing at home?
Where are Mary and Tom doing their homework?