[Grammar] simple or complex sentence?

[Nadeem Khan Bhati]

I met with 3 sentences in a grammar book. I couldn't guess them whether there were simple or complex sentence. Here are the sentences :

1. I don't know what he will do.

2. this is just what I wanted.

3. I expect that it will rain.

Thank you very much!

 

[Rover_KE]

You asked the same question in WordReference forums, where you have just claimed to be a teacher after receiving answers in what turned out to be a lengthy thread.

You are clearly attempting to deceive us and are not welcome here.