1.ago表示多长时间前发生的事情。
例如，现在是 2010 年，2005 年发生的事情就是: it happened five years ago.We met two years ago.我们两年前见过。2.ago 通常用在一般过去式中。
I did it a moment ago.我刚刚才做的。3.ago 和 since 不能同时使用。
例如，我们说 It happened three years ago。或 It is three years since it happened。而不说It is three years since it happened。He died two years ago. 他两年前就去世了。It is two weeks since I wrote to you. 我两个星期前给你写的信。agree1.agree 同意，表示和某人持相同的意见。
That film was excellent.这部电影太棒了 —‘I agree.’ 我同意。也可以说 agree with sb 或 agree with what they say。
I agree with Mark. 我同意马克的意见。 He agreed with my idea. 他和我想法一致。2.我们不说 agree sth，或者 be agreed with sth agree 不能使用进行时
例如，不说 I’m agreeing with Mark.3.短语 agree to do sth 表示同意做某事。不能说 agree doing sth。
She agreed to lend me her car.她同意把车借给我。4.agree on sth，表示商定某事，就某事达成协议。
We had a meeting with our clients and we agreed on a price.我们和客户一起开会商定了价格。你还可以说大家 agree to do somethingagreed to meet at 2 o’clock.大家定好两点开会。