是初一英语题

首先，我觉得你单词：“pian”是否打错了
are 后跟的应是V-ing
则pianning的词根是pian，我查了字典，这词是名词“=yaws，雅司病”之意，与句意不符
而若词根为piann，意为大饼，也不符

应该是plan，planning（计划，筹划）吧

则同义句为The Class1,Grade7 student are preparing（v.准备) a trip.

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刚没发现
student应用复数

pian? 是plan吧 应该是students 呵呵
很简单
a trip was planned by students
也许你还没有学被动语态

改成plan to do sth.

The students of Class1 Grade7 are planning to have a trip.
原句里俩地方写错啦```

student应该是复数，后面的动词are都是复数，plan a trip？
The Class1,Grade 7 students are going to have a trip.
be goingto 就是计划、打算的意思，和plan一样

There is a Class1,Grade7 student pianning a trip.
顺便说一下，这道题有问题，单数还用are!

试一下改成被动