虚拟语气, 愿望难成, 违背事实, 时态后退.(对高中学生有用) 从前有座房house,房中有浴缸bath, 缸中有青年youth,青年把嘴张mouth. (这些词变成复数时候,发音有变化) 一个儿歌: nine little monkeys jumped on a bed, one fell off and bumped his head, mum called a doctor and the doctor said, no more monkeys jumping on the bed. 我是I, 你是you ,他她它是he ,she ,it 我用am, 你用are ,is跟着他她它 . 单数用is,复数用are. 他们是they,我们是we, 宾格却是them 和us.
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