careful的比較級(jí)是more careful，最高級(jí)是the most careful。careful的意思是小心；注意；謹(jǐn)慎；細(xì)致的；精心的；慎重的。careful用作表語(yǔ)時(shí)，其后也可跟動(dòng)詞不定式、that從句。careful和about連用是小心的意思，通常后接指物的名詞、動(dòng)名詞或從句。

例句：

Careful on those stairs。走那幾段樓梯要當(dāng)心。

You have to be careful what you say on telly。在電視上說(shuō)話時(shí)你必須很謹(jǐn)慎。

I asked her to be more careful in future。我要她以后更加小心。

Can;t you be a bit more careful with my bike？你騎我的車就不能更小心點(diǎn)嗎？

Such an occasion demands the most careful consideration。這樣的場(chǎng)合需要最周到的考慮。

We all think he is one of the most careful students in his class。我們都認(rèn)為他是班里最細(xì)心的學(xué)生之一。

《careful的比較級(jí)和最高級(jí)》閱讀地址：http://www.osxg.com.cn/2023/1113/1330643.htm