After all, it's not every day you get a new job.

▲理解为强调句是可以的，在it's not every day省略了that。等于After all, it's not every day that you get a new job.还原后为：you don’t get a new job every day. not仍然否定every day。

意思是：“你不是每天都可以得到一份新的工作。”

▲It's not every day (that)...句式，在口语中很常见，已经由强调句转化为一个常用习语。意为“并不是每天都会怎样......”又如：

It's not every day you get the opportunity to study and live in a foreign country.到国外去学习和生活的机会不是每天都有的。

It's not every day you learn about other people around the world!毕竟不是每天都能知道世界上别人的事情。

It's not every day that one of your classmates wins an Olympic gold medal.你有同学赢得奥运金牌，那可不是天天发生的事。

【强调句的否定式】

有些否定句在变成强调句时，要把否定转移到被强调的词语之前。例如部分否定句，在变为强调句时，要把 not 提到 It is (was)之后。此外，not… until…句式的强调要特别注意，应将 not 置于被强调部分里面。

▲请比较以下两组，强调的角度不同:

A. It wasn’t I that made fun of him.不是我（而是别人）取笑他。

B. It was I that didn’t make fun of him. 就是我没有取笑他。

A. It wasn’t Mary that looked down upon you. 不是玛丽（而是别人）瞧不起你。

B. It was Mary that didn’t look down upon you. 就是玛丽没有瞧不起你。

▲注意以下句子如何变成强调句：

All of the boys in our class don’t like football.

→It isn’t all of the boys in our class that (who) like football.

Both sisters are not interested in physics.

→It isn’t both sisters that (who) are interested in physics.

Everybody doesn’t know the answer.

→It isn’t everybody that knows the answer.

All that glitters is not gold.

→It isn’t all that glitters that is gold.

Money can’t buy everything.

→It is not everything that money can buy.

He didn’t realize his mistake until the teacher had told him.

→It wasn’t until the teacher had told him that he realized his mistake.

You don’t get a new job every day.

→It's not every day (that) you get a new job.