One moment he wasn't there, the next he was.

　　他一分鐘前還不在那里，一會兒又在了。

　　She wasn't happy with our work and made us start over.

　　她對我們干的活兒不滿意，要我們返工。

　　It wasn't quite as simple as I thought it would be.

　　這事不完全像我想的那么簡單。

　　Now look here, it wasn't my fault.

　　喂，那不是我的錯！

　　She didn't even call to say she wasn't coming.

　　她甚至沒打電話來說一聲她不來了。