1. for a purpose: 为了……目的

eg. The only ture happiness comes from squandering ourselves for a purpose.
唯一的真正幸福来自坚持不懈地朝着目标前进。

2. now that: 既然

eg. Now that he'd come to the door, he thought he might as well go in with the others to have a look.
他想， 既然来到了门口，莫如跟着进去看看。

3. ask out: 请(某人)外出

eg. In the following few weeks, he continued to ask me out on several occasions.
在接下来的几周，他继续屡次邀请我外出。

4. invite in: 请（某人）进入（房间、房屋等）

eg. Don't invite him in, he's a dangerous man.
别请他到家里来，他是个危险的人。

5. in the middle of something: 正在忙（这里指收拾房间）

eg. Maybe we wake up in the middle of night wondering if we should have kept them away from the cats.
也许我们会半夜惊醒，想到或许应该让孩子不要接触家里的宠物猫。

6. be ready to: 准备好……

eg. So if you come, be ready to dance.
因此，如果你来到这儿，就准备好起舞吧。