介绍： 【Conversation】
Thanks for helping me in my yard , James.
No problem, Tina. It’s OK to get dirty. What should we do first?
Let’s plant this tree.
Sure. What kind of tree is it?
It’s a cherry tree. I can enjoy its beautiful blossoms.
Will it have fruit in the summer?
Yes. But you can’t eat the fruit.
Then...

介绍： 【Conversation】
Thanks for helping me in my yard , James.
No problem, Tina. It’s OK to get dirty. What should we do first?
Let’s plant this tree.
Sure. What kind of tree is it?
It’s a cherry tree. I can enjoy its beautiful blossoms.
Will it have fruit in the summer?
Yes. But you can’t eat the fruit.
Then you can’t make cherry pies. Too bad.
What will you do after we plant the tree?
Some spring cleaning.
My friends in Asia do spring cleaning at Chinese New Year.
Americans do theirs in spring when the weather gets warm.
What are you going to clean?
Many things.
How can I help?
You can either sweep the floor or mop it.
OK. But they both don’t sounds like much fun.

【Calendar phrase】
当要表达某件事没关系，你不介意的时候，可以用下列句式：
It’s OK to…
It’s OK to get dirty!(弄脏了没关系的)
It’s OK to take a break.(休息一下，没关系的)
It’s OK to make a mistake. (犯错不要紧)

如果你想让某人做这件事或者另一件事儿的时候，可以用以下句式：
You can either … or …
You can either come with us or stay at home.(你可以待在家或者跟我们走)
You can walk to school or ride the bus.（你可以乘车或者走着去学校）