one的序数词:first
students所有格:students'
I名词性物主代词:mine
diver现在分词:diving
have第三人称单数:has
翻译:你怎么了?What's wrong with you?或What's the matter with you?
否定句:I don't think the red pen is cheaper than the black one.
提问:Which shirt do you like?
What colour is the shirt?