Be动词单数后面就配单数，复数后面就配复数。或者其实因果是反过来的，因为this是单数，所以is；因为these是复数，所以是are。 一言蔽之，不可以说what’s these, 一定要 what are. 小学英语教学时遇到的问题。what are these的回答用they are.，为什么不用these are.呢？将this is… Delivery has failed to these recipients or groups的意思是邮件发送失败，未能成功投递给这些收件人或邮件组。 详细解释： 1.
Heather Locklear's Pals Worried for Her Wellbeing 'This is Beyond Scary'
These credentials do not match our records？ laravel的登录验证为什么检索不到数据库的信息？ 出现these credentials do not match our records.好尴尬。. 你可以这样回答： “these are grass.” 或者更自然地，“this is grass.” 因为即使他们用了“these”，我们仍然知道“grass”是不可数名词，所以使用“this is”是更准确的。 但在非正式语境中，人. Those / these are determiners and are used before nouns to refer to a particular group of things / people, e.g.
These people / those rules / those buildings.
