every後加什麼名詞是複數還是單數

We're open from 8 to 7 every day.

我們每天從早8點至晚7點營業。

Every single time he calls, I'm out.

他每次打電話來我都不在家。

Be reasonable! We can't work late every night.

要講道理呀！我們不能每天晚上都加班到很晚呀。

We see each other every now and again.

我們偶爾相見。

The same argument does not hold good in every case.

同樣的`論點並非在所有的情況下都正確。