You should be careful when you cross the road.（你过马路的时候应该小心。）

Be careful with that glass; it's very fragile.（拿那个玻璃杯要小心，它很易碎。）

The doctor examined the patient carefully to find out what was wrong.（医生仔细检查病人以查明病因。）

She is a careful student and always gets good grades because of her attention to detail.（她是个细心的学生，由于注重细节总是取得好成绩。）

Please be careful not to make any mistakes in this important document.（请小心，别在这份重要文件里出任何差错。）

He drives very carefully to avoid accidents.（他开车非常小心以避免事故。）

The artist was careful in choosing the colors for his painting.（这位艺术家在为他的画作挑选颜色时很谨慎。）

We need to be careful about our spending this month to avoid overspending.（我们这个月需要注意开支，以免超支。）

Careful planning is essential for the success of any project.（精心规划对任何项目的成功都至关重要。）

The mother was careful to wrap the baby warmly.（妈妈小心翼翼地把宝宝裹暖和。）

Be careful when you use the knife; it's extremely sharp.（使用这把刀时要小心，它非常锋利。）

They listened carefully to the instructions before starting the experiment.（他们在开始实验前仔细听了说明。）

The old man walked carefully on the icy path.（老人在结冰的小路上小心翼翼地走着。）

You must be careful with your words when talking to him.（和他谈话时你必须注意言辞。）

15. The detective was careful to collect every piece of evidence at the crime scene.（侦探小心翼翼地在犯罪现场收集每一件证据。）

She gave the report a careful read before submitting it.（在提交报告之前，她仔细阅读了一遍。）

Be careful not to wake the sleeping baby.（小心别吵醒正在睡觉的宝宝。）

The workers were careful while installing the heavy machinery.（工人们在安装重型机械时很小心。）

He made a careful decision after considering all the options.（在考虑了所有选择之后，他做出了谨慎的决定。）

We should be careful to protect the environment for future generations.（我们应该注意为子孙后代保护环境。）