Most of my middle school classmate...,

[Silverobama]

I was talking with a group of friends about the good old days (when we were young), I talked about my middle school, I said almost all my classmates were from a wealthy family except me. I wrote the sentence “Most of my middle school classmates have a wealthy family background. For instance, Grace’s dad was a successful business person and a bank boss* and Lin’s dad was an lucrative entrepreneur".

*: This “bank boss” refers to the top rank of a bank, the king of the bank who in charge everything and earns a lot of money.

Please help me with my italic sentence.

 

[Rover_KE]

Change an lucrative to a prosperous.

 

[Silverobama]

Most of my middle school classmates have a wealthy family background. For instance, Grace’s dad was a successful business person and a bank boss* and Lin’s dad was a prosperous entrepreneur.

Is the whole sentence natural now? You really say "bank boss"? Wow, that's something interesting.

 

[tedmc]

have a wealthy family background - are from a wealthy family background
bank boss - head of a bank
lucrative entrepreneur - successful entrepreneur

 

[Silverobama]

have a wealthy family background - are from a wealthy family background
bank boss - head of a bank
lucrative entrepreneur - successful entrepreneur

Rover just corrected the last phrase and this means that the rest of the sentence is okay.

 

[tedmc]

Rover just corrected the last phrase and this means that the rest of the sentence is okay.

I think the other phrases could be improved, which I have suggested. It's not just a matter of right or wrong, but how natural your sentence is. "Bank boss" is too informal and not a proper term, as you have said. I am open to comments.

 

[emsr2d2]

I was talking with a group of friends about the good old days (when we were young).

You really need to work on your punctuation. We almost always have to correct comma splices in your texts.
How old are you?! When people talk about the "good old days", they're usually talking about a time 50 years earlier or similar.

I talked about my middle school no comma here and I said almost all my classmates were from a wealthy family. except me.

You weren't one of your own classmates so you can't use "except me". If you want to use those two words, you'd have to say something like "Almost everyone in the class was from a wealthy family, except me".

I wrote the sentence “Most of my middle school classmates have were from a wealthy family background. For instance, Grace’s dad was a successful business person and a the head of a bank, boss* and Lin’s dad was an lucrative a prosperous/successful entrepreneur".

See above.
I've left "wealthy family" and removed "background" because the only examples you gave went back one generation (Grace's and Lin's fathers). For me, a wealthy background would indicate that the family had been wealthy for several generations.
I suspect different banks in different countries use different job titles for the person at the very top so I've stuck with the "head". In general, I believe, the top two roles at a bank are the Managing Director and the Chief Executive Officer.

* This “bank boss” refers to the top rank level of at a bank, the king of the bank and the person who is in charge of everything. and earns a lot of money.

You need to do more work on your sentence construction. I'm sure that if you'd looked more closely, you'd have realised that "who in charge everything" wasn't right!

 

[Silverobama]

You really need to work on your punctuation. We almost always have to correct comma splices in your texts.

I always write down all the sentences rewritten by you and other teachers here in my notebook. I've been trying to avoid those problems (like the one about "then"). I'm sorry for this one. I use the comma in the first sentence in the OP because I thought what I was talking about was coherent and if I used a period, the sentence wouldn't make much sense.

How old are you?! When people talk about the "good old days", they're usually talking about a time 50 years earlier or similar.

37. I was using it in a joking manner.

You need to do more work on your sentence construction. I'm sure that if you'd looked more closely, you'd have realised that "who in charge everything" wasn't right!

Sorry. I was typing too fast. I think I've spent too much time checking the spellings of what I type here and sometimes I forget to check the grammar. Sorry.