【问】 (A) Suppose we go for a swim.

(B) Suppose we went for a swim.

上面两个句子哪个句子是正确的?

【答】 上面两个句子都是正确的。这就是说suppose的宾语从句既可用陈述语气，也可用虚拟语气。上面两句中的suppose用于提出建议或请求，有时候相当于一个祈使句。在suppose后面的从句中使用过去时主要是为了使所提出的建议变得客气、委婉，或者使所提出的建议听起来不那么肯定。

1. Suppose we have lunch now! (Chambers)

我们现在吃午饭好吗?

2. Let us suppose that a child suddenly crosses the road in front of you. (New Concept Eng-lish，Book 2，L.69)

现在假设一个小孩突然在你面前穿过马路。

3. Suppose you meet me at the post office at half-past seven. (Palmer)

你七点半到邮局来找我，好吗?

4. “Daddy，can I watch TV?”——“Suppose you did your homework first?”(PEU)

“爸爸，我能看电视吗?”——“你先做家庭作业，怎么样?”

(参见suppose¹)