并列主语的一致
and / both…and 用复数；each / every 用单数。
A and B + 复数谓语；each / every + 单数谓语
要点
- and 或 both…and 连接两个主语时，谓语用复数。
- 两个名词指的是同一个人或事物时，谓语仍用单数。
- each、every、no 修饰的单数名词并列时，谓语用单数。
- along with、together with 不影响谓语（就前原则）。
- and 前后是同一个人或同一样东西时，第二个名词前不再加 the ／ a；加了就是两个，谓语跟着换复数 —— 冠词的有无就是判据。
- and 连接的是两个从句或两件事时谓语用复数：What he says and what he does are two different things. —— "从句作主语算一件"那条只管一个从句。
- 并列人称的习惯顺序是别人在前、自己在后，作主语还要用主格：My parents and I are going. —— 不说 I and my parents，也不用 me 顶 I；格的选择见「人称代词：主格与宾格」。
例句
Reason and logic are tools for thinking.
理性和逻辑是思考的工具。
Koalas and kangaroos are native to Australia.
考拉和袋鼠是澳大利亚的原生动物。
Cars and buses are our main transportation to the park.
去公园我们主要靠汽车和公共汽车。
Every contribution counts.
每一份贡献都很重要。
A knife and fork is laid on the table.
餐桌上摆好了一副刀叉。
His uncle and I are both learning to drive.
他叔叔和我都在学开车。
易错提示
- The writer and teacher is…（同一人，谓语用单数）。
- Tom as well as his friends is…（就前原则，只看 Tom）。
- 两个不可数名词用 and 连起来照样走复数：Water and oil do not mix. —— 单个不可数用单数，并成两块就归 and 那一头。