◆他们同意我做这事。

误：They agreed me to do it.

正：They agreed to let me do it.

正：They agreed to my doing it.

析：不要按汉语习惯用 agree sb to do sth 来表示“同意某人做 某事”, 要表示此意, 需改用其它结构。

◆他们大多数同意帮助我们。

误：Most of them agreed helping us.

正：Most of them agreed to help us.

析：表示同意做某事，agree 后要接不定式，不接动名词。

◆他想出国，但我们没一个人同意。

误：He wanted to go abroad, but none of us agreed (to) him.

正：He wanted to go abroad, but none of us agreed with him.

析：表示同意某人(或某人的想法、意见等), 要用 agree with sb, 不用 agree (to) sb。

◆这种天气对她不适宜。

误：The weather does not agree to her.

正：The weather does not agree with her.

析：表示“(食物、天气、工作等)对 ...适宜”, 英语要用 agree with。如：Hard work does not agree with him. (艰苦的工作对他不适宜)。/ Such food doesn’t agree with babies. (那样的食物对婴儿不适合) (from www.yywords.com)。

◆我们已商定好了这辆旧车的价钱。

误：We have agreed with (to) the price for the old car.

正：We have agreed on the price for the old car.

析：agree on 指双方通过讨论或协商而取得一致的意见或达成协议，其主语通常为复数形式或表示复数意义的词。又如：We didn’t agree on when to start.(关于什么时候出发, 我们没有达成一致意见)。