建议suggestion可数吗

　　He agreed with my suggestion that we should change the date.

　　他同意我提出的更改日期的建议。

　　If this suggestion isn't accepted, we'll be back to square one.

　　如果这个建议得不到采纳，我们就得从头再来了。

　　Can I make a suggestion?

　　我提个建议好吗？

　　There was no suggestion that he was doing anything illegal.

　　说他在从事非法活动无任何根据。

　　If I may make a suggestion, perhaps we could begin a little earlier next week.

　　我来提个建议吧，或许我们下个星期可以早一点开始。