问题: It’s = it is(指代物体的单数它) this is 这是… here it is (口)地点副词 whose 谁的 人称代词几种情况:物主代词,名词性物主代词,名词所有格 名词所有格:人名+’s “…的“(形容词性物主代词,名词性的物主代词) 形容词性物主代词必须作定语,修饰别的词。 This is my pen. This pen is mine. This pen is Tim’s. This is Tim’s pen. 对形容词性进行提问,后面的词不能省略。 Whose pen is this? Whose is this pen?