我昨天没看见他。他一定生病了。

I didn't see him yesterday. He must have be ill.

youdao

比尔一定生病了，这是惟一能解释他缺席的原因。

Bill must be ill; it's the only thing that accounts for his being away.

youdao

如果第一个说话人的力气太多使你吃惊，那么后者就让人觉得他好像病了--但那倒不一定。

While the first speaker 12)assaulted you with too much energy, the second sounds as if he might be sick, but it ain't necessarily so.

youdao