1.assist是正式用语,它的原意是“与…站在一起”,现代英语中主要作“帮助,促进”解,指帮助者处于次要或从属的地位。
2.assist用作及物动词时其后可跟简单宾语或以动词不定式充当补足语的复合宾语; assist也可用作不及物动词。

assist at(v.+prep.)
作陪,在场帮忙 be present at and give help with sth
▲assist at sth
The young nurse was very nervous when she assisted at her first operation.这位年轻的女护士首次当手术助手时,心情非常紧张。
We'll assist at your wedding.我们将出席你们的婚礼。

assist in(v.+prep.)
在…上给予协助 help with sth or doing sth
▲assist sb in sth/v-ing
He assisted me in the preparation of this book.他协助我撰写此书。
We'll assisted them in their difficulty.我们要在他们困难的时候帮助他们。
We shall do our best to assist him in correcting his mistakes.我们将尽力帮他改正错误。
My wife assisted me in editing the book.我的妻子帮助我编辑了这本书。
He assisted me in painting the door.他帮助我漆这门。
I am most grateful to my husband, who assisted me in preparing this book.我非常感谢我的丈夫,他曾协助我撰写此书。
The boy assisted his father in sweeping the floor.那男孩帮他父亲擦地板。

assist with (v.+prep.)
帮助; 照料; 做; 在…给予帮助 help sb with sth, sb, or doing sth
▲assist with sth/v-ing
The nurse assisted with the preparation of the medicine.护士帮助准备药品。
She assisted with preparing the medicine.她帮助准备药品。
▲assist sb with sb/sth
She assisted him with his English.她帮助他学英语。
He assisted me with good counsel and encouragement.他以良好的忠告和鼓励帮助我。
He assisted his son with his homework.他帮助儿子做作业。
He assisted a gentleman on with his coat.他帮助一绅士穿上外套。
Local villagers assisted the doctors with the people wounded in the bus crash.当地村民帮助医生照料在车祸中受伤的人们。

用作不及物动词
▲S+～(+A)
When all assist, the job can be done quickly.如果大家都帮忙,这项工作很快就能完成。
I am willing to assist whenever there is an opportunity.有机会我愿随时帮你。
用作及物动词
▲S+～+n./pron.
I'm afraid I can't assist you. You have to go and see the manager.我恐怕帮不上忙。你得去找经理。
Do you need anyone to assist you?你需要人帮助你吗?
The driver assisted the old man out of a car.司机帮助那位老人下车。
A young man was assisting a disabled man up the stairs.一个年轻人正帮助一位残疾人上楼。
用作宾补动词
▲S+～+n./pron.+to-v
He assisted the old man to fill in the forms.他帮助老人填写表格。
She assisted him to correct the proof.她帮助他改校样。
Good glasses will assist you to read.好眼镜对你的阅读很有帮助。
Bring the horse and assist him to mount.把马牵过来,帮助他骑上马。
Tom assisted a child to food.汤姆帮助小孩拿到食物。

assist, aid, help
这组词都有“帮助”的意思,但有区别:
1.aid多指经济上或其他方面急需的援助,而assist只是表示辅助性的帮助, help用法则比较广泛,它可以代替aid和assist,可以指任何形式的帮助。
2.help和aid既可用作名词,也可用作动词; assist只能用作动词。
3.help强调积极地予以实际的、精神的或物质的帮助; assist主要用于帮助别人工作、学习或研究; aid是对别人的努力加以援助,还可指不必亲自动手的帮助。
4.就对象而言, aid不仅用于个人,还多用于团体; assist多用于个人,特别是智力方面的研究。
5.help是普通用语,特别是在日常谈话中; aid和assist是比较正式的用语,在日常谈话中不常用。

1.习语assist at源于法语,近代英语中用得较少,多代之以be present at。
2.assist有时也可用作名词,意思与用作动词时相同。

［派生词］ assistor n.帮助者