enter...noisy class

Can I say,

He enters the noisy class.

When he enters the class, the class is noisy,

While entering the class / classroom, it was noisy.

When entering the class, the class is noisy.

Mister Micawber

It makes most of your sentences slightly unreal.

I didn't know it made native speakers feel this way. It always makes me think of it as a story told as it unfolds. Is that what you call unreal, MM?

Thanks your advice.

Can I say,


While he entered the class, the pupils are noisy,

Vincent,
I had offered you my honest advice many times in the past basically letting you know that for the past 2 two years you had not made any improvement after all the help you got from the forum because you have chosen an incorrect method. If you had used the time to correct your English basics instead of copying patterns which you don't understand, you wouldn't make the simple tense errors. I still give you the same advice.

Regardless of reasons, you have not learned correctly, although you may think you have.

Many people can learn languages through immersion which is highly achievable.  However,  
they may not understand the grammar and mechanics of the language. We can always learn to do things
without understanding the principles. But of course there is a price to pay, and that is when we run into problems
we wouldn’t  know how to fix them, as it is in your case.    

 

I have revised your reply in natural English so that you can see where the problems are.  

                       

 

 

 

 

 

Thanks [for ] your advice. I have learnt much more from this website. The most important [thing]  
is I’ve learned how a native thinks and speaks in natural English know what is the natural way the native
 speaker thought or say. That's the only way I could have learnt which is from the website. I 'm not [able to ]
afford to buy books. Instead, I use  of using the free [help on the]  usage of Internet. Anyway, thanks [for] your advice, once again!!