自从去年以来,天气变得越来越冷。
zìcóng qùnián yǐlái , tiānqì biàndé yuèláiyuè lěng 。
Since last year, the weather has become colder and colder.
我从上个月以来就开始锻炼身体。
wǒ cóng shànggè yuè yǐlái jiù kāishǐ duànliàn shēntǐ 。
I have been exercising since last month.
自从他离开以来,我一直很想念他。
zìcóng tā líkāi yǐlái , wǒ yīzhí hěn xiǎngniàn tā 。
Since he left, I have missed him a lot.