offer作动词的用法:

1.offer有"(主动)拿给,给予"的意思,相当于give，后可接名词或代词作宾语,也可接双宾语,即offer sb sth =offer sth to sb
如:
The young man offered  his own seat to the old man.
那个年轻人将自己的座位让给了那个老人.

Many people willingly offered their blood.
很多人自愿献血.

2.offer意为"提出、表示"
如:
Johnson offered a new suggestion.
约翰逊提出了一个新建议.

We all went to offer congratulations.
我们都前去表示祝贺.

3.offer to do，表示"主动提出做某事"
如:
He offered to drive us to the airport.
他主动提出送我们去机场。

She offered to lend me her bike.
她提出将自行车借给我.

4.offer还有"出售"、"出价"的意思.

① offer sth for (money) 以多少钱出售某物
He offered this bike for 600 yuan.
这辆自行车他要价600元.

② offer sb (money) for sth / to buy sth 出价多少购买某物
They offered him 3,000 yuan to buy the laptop.
他们愿出3,000元来买他的笔记本电脑.