以来

我wǒ三sān天tiān以来yǐlái没méi吃chī一点yīdiǎn东西dōngxi。

I have not eaten anything for the last three days.

这zhè是shì三十sānshí年代niándài以来yǐlái最zuì干旱gānhàn的de六月Liùyuè。

This has been the driest six months in thirty years.

这zhè家jiā企业qǐyè近jìn6个gè月yuè以来yǐlái一直yīzhí在zài欠薪qiànxīn。

The business hasn't been paying for the last six months.

本běn世纪shìjì初chū以来yǐlái，产生chǎnshēng了le很hěn多duō进步jìnbù。

Many improvements have been made since this century began.