及物动词
1. We all assisted in mending the roof.
我们都帮助修理屋顶。
2. We asked him to assist us in designing a new bridge.
我们请他帮助我们设计一座新桥。
不及物动词
1. He assisted in designing the new bridge.
他协助设计那条新桥。
2. She refused to assist at the reception for reasons unknown.
不知什么缘故她不肯出席招待会。