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。）

He runs every morning for his health. （他为了健康每天早上跑步。）

We need to prepare some food for the picnic. （我们需要为野餐准备一些食物。）

She studied hard for the exam last night. （她昨晚为了考试努力学习。）

They are waiting for the bus at the station. （他们正在车站等公共汽车。）

This room is for guests to stay in. （这个房间是供客人住的。）

For this reason, we had to change our plan. （出于这个原因，我们不得不改变计划。）

I've been saving money for a new car. （我一直在存钱买一辆新车。）

The teacher gave us some exercises for practice. （老师给我们布置了一些练习题用于练习。）

He works hard for a better life. （他为了更好的生活努力工作。）

We use knives for cutting things. （我们用刀来切东西。）

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

She made a beautiful card for her mother on Mother's Day. （她在母亲节为她妈妈做了一张漂亮的卡片。）

They traveled around the world for adventure. （他们为了冒险环游世界。）

This tool is for fixing the machine. （这个工具是用来修理机器的。）

I'm looking for my lost keys everywhere. （我正在到处找我丢失的钥匙。）

For many years, he has been helping those in need. （多年来，他一直在帮助那些有需要的人。）

We should plant more trees for the environment. （我们应该为了环境种更多的树。）

The party is for celebrating his promotion. （这个派对是为了庆祝他升职。）

He wrote a song for his beloved girl. （他为他心爱的女孩写了一首歌。）