用作形容词(adj.)

He is careful in his speech.他说话谨慎。

Be careful in deapng with such people.与这种人打交道要小心谨慎。

You should be more careful with your money.你花钱要慎重一些。

After careful consideration, we've decided to accept their offer.经过慎重的考虑，我们决定接受他们的提议。

He is extremely careful about his appearance.他十分讲究外表。

The sick boy came round with careful nursing.那个生病的男孩经过精心护理已经康复了。

Her careful make-up hid the signs of age beneath.她的精心化妆掩饰了脂粉下面岁月刻下的痕迹。

用作形容词(adj.)用作定语～+ n.

He took careful aim and fired at the rabbit.
他仔细瞄准,然后向兔子开枪射击。

This problem calls for careful thinking.
这个问题需要仔细考虑考虑。

It isn't enough just to cast your eyes over this blue-print; you should make a careful study of it.
这份图纸只是草草过一眼是不够的,你得仔细地推敲推敲。

Without careful investigation you're pable to come to wrong conclusions.
不仔细调查研究,你就会得出错误结论。

用作表语S+be+～

He was careful as ever.
他和以前一样仔细。

—Is that lobster apve?—Yes, be careful.It's very much apve.——
那只龙虾是活的吗?——是的,当心!它还是活生生的呢!

S+be+～+ prep .-phrase

Be careful in money matters.
在钱方面要特别小心。

Be careful in doing this.
做这件事一定要细心。

Be very careful with fire.
要特别小心火。

Be careful with the glassware, don't get cut.
接触玻璃器皿要当心,别让其划破。

S+be+～+to- v

Be careful not to bind off too tightly, or the work will lose its shape.
注意收针时别太紧,否则会走样的。

Be careful not to crease up the pages.
当心,不要把书弄皱了。

Be careful not to get eaten up with pride.
注意不要骄傲自满。

S+be+～+ v -ing

You should be careful crossing deep forests.
从森林穿行时你应特别小心。

S+be+～+(that/)wh-clause

Be careful that you don't drop the vase.
当心别把那花瓶打了。

Be careful you don't ask for any more.
注意,你不要再要了。

Be careful how you hold it.
你要注意怎么样拿着它。

Be careful how you walk in this field. There are lots of rocks cropping out.
你在这块地行走时要小心,地面上有许多露出来的石头。

Be careful how you answer, or you might furnish an advantage to your opponent.
要谨慎作答,否则你可能给对手以可乘之机。

Be careful when you're crossing the road.
过马路时要小心。

S+be+～+as to wh-clause

You must be careful as to what you say or do.
对你所说或所做的一切要小心。

You have to be careful as to how you spend the money.
对于如何花这笔钱你必须谨慎。

用作形容词 (adj.)～+名词

careful answer谨慎的回答

careful examination仔细调查

careful man细心的人

careful plan彻底的计划

careful reading精读

careful sum细数目

careful tone of speech关切的口吻

副词+～

extremely careful很讲究

overly careful过于仔细

～+介词

careful about注意,重视,关切,讲究

careful about one's appearance讲究外表

careful for当心,留意,注意

careful in在…方面谨慎的

careful of保护,保重,注意

careful with注意,照顾

careful的详细讲解：

adj.(形容词)

careful的基本意思是“仔细的”“小心的”,含有靠认真实践来避免错误的意味。

careful和about连用,通常后接指物的名词、动名词或从句。

careful用作表语时,其后也可跟动词不定式、that/wh-从句。

careful和of连用,通常后接指人或事物的名词,也可接从句。接从句时，of常省略。

adj.(形容词)你做练习时必须细心。

误 You must be careful of your exercises.

正 You must be careful with your exercises.

析 be careful of 是“提防”“当心”的意思; be careful with则是“认真做某事”“慎重对待某事”的意思。

你应该更加注意自己的健康。

误 You should be more careful for your health.

正 You should be more careful about〔of〕 your health.

析 be careful for表示“对…挂念”“对…惦记”,表示“注意”“关心”要用be careful about〔of〕。

careful的相关资料：

用作形容词(adj.)

He is careful in his speech.他说话谨慎。

Be careful in deapng with such people.与这种人打交道要小心谨慎。

You should be more careful with your money.你花钱要慎重一些。

After careful consideration, we've decided to accept their offer.经过慎重的考虑，我们决定接受他们的提议。

He is extremely careful about his appearance.他十分讲究外表。

The sick boy came round with careful nursing.那个生病的男孩经过精心护理已经康复了。

Her careful make-up hid the signs of age beneath.她的精心化妆掩饰了脂粉下面岁月刻下的痕迹。

用作形容词(adj.)用作定语～+ n.

He took careful aim and fired at the rabbit.
他仔细瞄准,然后向兔子开枪射击。

This problem calls for careful thinking.
这个问题需要仔细考虑考虑。

It isn't enough just to cast your eyes over this blue-print; you should make a careful study of it.
这份图纸只是草草过一眼是不够的,你得仔细地推敲推敲。

Without careful investigation you're pable to come to wrong conclusions.
不仔细调查研究,你就会得出错误结论。

用作表语S+be+～

He was careful as ever.
他和以前一样仔细。

—Is that lobster apve?—Yes, be careful.It's very much apve.——
那只龙虾是活的吗?——是的,当心!它还是活生生的呢!

S+be+～+ prep .-phrase

Be careful in money matters.
在钱方面要特别小心。

Be careful in doing this.
做这件事一定要细心。

Be very careful with fire.
要特别小心火。

Be careful with the glassware, don't get cut.
接触玻璃器皿要当心,别让其划破。

S+be+～+to- v

Be careful not to bind off too tightly, or the work will lose its shape.
注意收针时别太紧,否则会走样的。

Be careful not to crease up the pages.
当心,不要把书弄皱了。

Be careful not to get eaten up with pride.
注意不要骄傲自满。

S+be+～+ v -ing

You should be careful crossing deep forests.
从森林穿行时你应特别小心。

S+be+～+(that/)wh-clause

Be careful that you don't drop the vase.
当心别把那花瓶打了。

Be careful you don't ask for any more.
注意,你不要再要了。

Be careful how you hold it.
你要注意怎么样拿着它。

Be careful how you walk in this field. There are lots of rocks cropping out.
你在这块地行走时要小心,地面上有许多露出来的石头。

Be careful how you answer, or you might furnish an advantage to your opponent.
要谨慎作答,否则你可能给对手以可乘之机。

Be careful when you're crossing the road.
过马路时要小心。

S+be+～+as to wh-clause

You must be careful as to what you say or do.
对你所说或所做的一切要小心。

You have to be careful as to how you spend the money.
对于如何花这笔钱你必须谨慎。

用作形容词 (adj.)～+名词

careful answer谨慎的回答

careful examination仔细调查

careful man细心的人

careful plan彻底的计划

careful reading精读

careful sum细数目

careful tone of speech关切的口吻

副词+～

extremely careful很讲究

overly careful过于仔细

～+介词

careful about注意,重视,关切,讲究

careful about one's appearance讲究外表

careful for当心,留意,注意

careful in在…方面谨慎的

careful of保护,保重,注意

careful with注意,照顾

careful的详细讲解：

【近义词】

• cautious
• guarded
• thoughtful

【反义词】

• careless
• neglectful
• rash
• thoughtless