Tell me about it!: used to say that you understand what somebody is talking about and have had the same experience 你算說對了; 的確

A: My teacher's so cruel... I can't believe how much homework I have!
B: Tell me about it! I barely even have time to sleep anymore.
我的老師太過分了……難以相信居然布置了這么多作業!
就是說嘛!我都快沒時間休息了.

A:I get so annoyed with Steve!
B:Tell me about it. He drives me crazy.
史蒂夫把我煩透了!
你算說對了.他快把我逼瘋了.

Not up to scratch: 不符合要求,不達標準

A: Have the workmen finished repairing your roof yet?
B: Well, they said they had finished it last week, but I had a look at it and their work wasn't really up to scratch, so I'm making them redo it.
工人把你的房頂修好了嗎?
呃,他們說上個星期就修好了,但我看過了,他們的工作不符合要求,所以我讓他們返工.

bring somebody/something up to scratch 令某人/物達到令人滿意的程度

It'll take months to bring the band up to scratch. 得幾個月工夫才能使樂隊像個樣子.