以下英语句子对吗？

1.All you need to do is move your chair a few steps.need后要加一个to,而is后的TO一定要省,因为当主语从句有实义动词DO且主句有不定式做表语时TO一定要省.
再看一句,What I want to do is(TO) take a holiday at the weekend.括号的TO一定要省.
2.Come on, let us go and look at the sunset now.一个句子不能有两个动词,我们必须要用连词将它们连接起来

All of you need do is to move your chairs a few steps.
Come on, let us go and look at the sunset now.

1.All you need to do is moving your chair a few steps nearer/ farther.
need 后经常跟动词不定式，move不能用动词原形做表语，要改成动名词或动词不定式。a few steps 后面必须加上更远或更近或之类的词。
2.Come on， let us go and look at the sunset now.
或：come on， let us go to look at the sunnet now.
两个动词不能同时出现在一个简单句里，要么改为两个并列句，要么把其中的一个动词改为非谓语，例如，改为动词不定式做目的状语。

1.All you need is to move your chair a few steps.
need后面的do完全可以省略。句子更简洁明了。
2.Come on, let's go and look the sunset now.
look at 有看、考虑、着眼于等深层的含义，而此处表达看日落仅需用look即可。
（仅供参考）

1.All of you need to do is moving your chair a few steps .
2.Come on， let us