Sentences with new words that I didn't know before.

BACKDROP: I've discovered in the backdrop of my wardrobe a new pants which I have never used before.

A little unusual to use backdrop in this way. Usually used for a scene or background. for instance a photograph. The backdrop to your wedding photographs was stunning

SEVERAL: I can see (have seen?) several movies with bad actors. / I have several things to do before going there. (can see means you are able to. Perhaps not what you meant)

CONVERGE: In a meeting everybody are converged.

Again a little strange. perhaps the opinions or views converged. or maybe they converged on the new strategy. just to say they converged is a little unnatural. 

THROUGHOUT: yesterday I studied throughout the day.

RELATED: We are related because we are cousins.

WRECK: I've failed an imporant exam, I'm wrecked.

Very informal use when applied to a person. 

I crashed my car at the weekend. it is completely wrecked

ARRANGEMENT: My friend and I have an arrangement for this next thursday.

SET OFF: I must to set off right now! I'm gonna miss my flight!

SUGGESTED: I would suggest that you don't be so impatient.

HEAD BACK: when I headed back to my country, I realised how much I love my country.

DEVASTED: After she died, her son was devasted.

CHANGE MY MIND: If I don't change my mind, I will go to the university.

DEAF: My grandad is deafer each time. (better)

BLIND: She is so blind in love that she can't realise of the truth.

FLEA: My dog doesn't have fleas.

SUPPOSE: I supposed you would be here today. But it is not so. You aren't here yet.

Sounds a little strange. you are more likely to say expected. 

I suppose you will want to eat out on your brithday. 

I suppose we could go to the party tonight as i am not working. 

COUGH: Who has been coughing all the night?



It's enough for today. I should do that kind of list every day for learn, but I don't have too much time free since this last week. Actually it doesn't take me too much time to do a list like that. I think it would be a good idea to improve my vocabulary.
And if someone corrected it to me, it wouldn't be done for nothing.

 
It's That's enough for today. I should do that this kind of list every day to help my for learning, but I don't have that too much free time free since this last week. Actually it doesn't take me too that much time to do a list like that this. I think it is would be a good idea to improve my vocabulary.
Also And if someone corrected it for to me, it wouldn't have been done for nothing.

estupendo trabajo !!!!

Your grasp of english is very good, you should be proud of yourself.