作者:秦怡语法一致原则过去进行时一般现在时一般过去时虚拟语气yesterday谓语动词动词形式不可数名词定语从句
摘要:一、观察I am a teacher.You are my students.She is a hard-working girl.He was a handsome boy.They were running on the playground this time yesterday.通过观察例句同学们会发现:在英语中,be动词主要用在一般现在时、一般过去时和过去进行时中,有不同的人称形式am/are/is/was/were。虚拟语气中没有主谓一致原则,如:If I were you,I would study hard.
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