I had no sooner lain down than the telephone rang.

我刚躺下,电话铃就响了.

《简明英汉词典》

They could have lain down on the ground and done that if they had wanted to.

如果他们愿意,也可以在地上躺下来干那个.

英汉文学

There were plenty of empty seats. Had he wanted to, He could have lain down.

坐位很宽舒, 勉强要躺躺也可以.

汉英文学 - 中国现代小说