I bought a book for my sister as a birthday present.（我给我妹妹买了一本书作为生日礼物。）

She has been waiting for the bus for half an hour.（她已经等公交车半个小时了。）

For this reason, we decided to change our plan.（出于这个原因，我们决定改变计划。）

He works hard for his family to have a better life.（他为了家人能过上更好的生活而努力工作。）

We need some tools for fixing the car.（我们需要一些工具来修理汽车。）

For breakfast, I usually have bread and milk.（早餐我通常吃面包和喝牛奶。）

They went to the park for a picnic on Sunday.（他们周日去公园野餐。）

This room is for storing old things.（这个房间是用来存放旧东西的。）

I'm saving money for a new computer.（我正在存钱买一台新电脑。）

The teacher is looking for students who can participate in the competition.（老师正在寻找能参加比赛的学生。）

For many years, he has been dedicated to helping the poor.（多年来，他一直致力于帮助穷人。）

These flowers are for beautifying the environment.（这些花是用来美化环境的。）

She prepared a special dinner for her husband's return.（她为丈夫的归来准备了一顿特别的晚餐。）

For safety reasons, we should wear seat belts in the car.（出于安全考虑，我们在车里应该系安全带。）

They are training hard for the upcoming sports meeting.（他们正在为即将到来的运动会刻苦训练。）

This gift is for expressing my gratitude to you.（这个礼物是为了表达我对你的感激之情。）

For instance, you can try this method to solve the problem.（例如，你可以试试这个方法来解决问题。）

We use chopsticks for eating Chinese food.（我们用筷子吃中餐。）

He is famous for his excellent painting skills.（他因出色的绘画技巧而闻名。）

For the future, we should make more efforts to achieve our goals.（为了未来，我们应该更加努力去实现我们的目标。）