回

汉语句子“该吃午餐了。”翻译成英语时，它的表达方法有好几种呢！

因此，这个句子的同义句是这样的：

1. It's time to have/ eat lunch.

3. It's time for us to have lunch.

4. It's time that we had lunch.

5. It's ( high)time that we should have lunch.