二、重点难点
1.---when you leave it. ---当你使它---
leave 动词，意为“使处于某种状态”，常接形容词、副词、介词、现在分词或过去分词作宾语补足语。
Leave the door .让门开着。
When you leave, don’t leave the stove .不要让炉火开着。
2.Can we stop cleaning the house and make some food?
stop doing sth.“停止做某事”/stop to do sth.“停下来做某事”
We are tied. Let’s stop (have ) a rest.
The students stopped (talk) when the teacher came into the classroom.
