One moment he wasn't there, the next he was.
他一分钟前还不在那里，一会儿又在了。
She wasn't happy with our work and made us start over.
她对我们干的活儿不满意，要我们返工。
It wasn't quite as simple as I thought it would be.
这事不完全像我想的那么简单。
Now look here, it wasn't my fault.
喂，那不是我的错！
She didn't even call to say she wasn't coming.
她甚至没打电话来说一声她不来了。