but的主谓一致

英语中的连词but是一个常用的连接词，用于连接两个相对矛盾的句子或者短语。当我们使用but时，我们需要注意主谓一致的问题，因为but连接的句子往往是对立的，如果主谓不一致就会影响句子的意思和语法正确性。

举个例子：

错误用法：She is smart but her friends is not.

正确用法：She is smart but her friends are not.

在上面的例子中，我们可以看到错误用法中的主谓不一致，her friends is not应该改为her friends are not，以与前面的主语She一致。

下面是一些关于but主谓一致的常见错误用法和正确用法：

| 错误用法 | 正确用法 | | --- | --- | | He likes to play soccer, but his teammates doesn't. | He likes to play soccer, but his teammates don't. | | She is a good student, but her grades wasn't good. | She is a good student, but her grades weren't good. | | They are happy, but their dog seems unhappy. | They are happy, but their dog seems unhappy. |

总之，当我们使用but连接两个句子时，需要确保主谓一致，以保证句子的意思和语法正确性。希望这篇文章能帮助你更好地使用英语中的but。