am复数：are

vi.(用于第二人称单复数现在时,第一、三人称复数现在时)是

v.aux.(与v-ing连用构成现在进行时;与v-ed连用构成被动语态)

例句：

They are campaigning to save the area from building development.

他们正开展一场反对在这个地区进行房地产开发的运动。

The tests are designed to detect the disease early.

这些检查旨在早期查出疾病。

The first part of the plan has been safely accomplished.

计划的第一部分已顺利完成。

There are four GPs in our local practice.

在我们地区诊所有四个全科医生。

I've been trying to contact you all day.

我整天一直在设法与你联系。