三人行用英语怎么说

三人行用英语可以说"three's a crowd"。

以下是几组三人行用英语怎么说的中英双语例句：

1. We were planning to go to the movies, but then John invited himself along. Three's a crowd, so we decided to do something else.（我们本来打算去看电影，但是约翰自己插了进来。三个人太多了，所以我们决定做别的事情。）

2. Sarah, Tom, and I went out for dinner last night. It was fun, but sometimes three's a crowd and it's hard to have a conversation with everyone.（昨晚我、莎拉和汤姆一起出去吃饭了。很有趣，但有时候三个人在一起有点拥挤，很难和每个人都聊天。）

3. I was going to ask if you wanted to come to the beach with me and Jack, but then I remembered that three's a crowd and you might not want to be the third wheel.（我本来想问你要不要和我和杰克一起去海滩，但是我想到三个人在一起有点拥挤，你可能不想当第三个人。）

4. We used to hang out all the time, but ever since Sarah started coming along, it's been a little awkward. Three's a crowd, you know?（我们以前总是一起玩，但是自从莎拉加入以后，有点尴尬了。三个人在一起有点拥挤，你懂的。）

5. I don't mind if you invite your friend to come along, but just remember that three's a crowd and we might not be able to do everything we planned.（我不介意你邀请你的朋友一起来，但是请记住三个人在一起有点拥挤，我们可能无法完成所有计划。）