Thank you for your last corrections. Here are some more sentences for you to check.

1) He suggests he should get (not make) a loan from a moneylender.
2)He should ask Shylock for the money.
3) The man who wants to marry her should do (perform??) a precise task. He should choose between three caskets. The one who chooses the correct casket will find a letter in it allowing him to marry Portia.
4) The task consists in choosing between three caskets made of gold, silver and lead respectively.
5) Shylock promises to lend him the money if he pays back the loan in three months’ time. If he fails to pay off his debt, Shylock will be entitled to take a pound of Antonio’s flesh.
6) Shylock thinks that it’s Antonio’s fault if his daughter left home.
7) If a debtor couldn’t find the money to pay back his loan, he was granted a 30-day grace period to pay it. If he failed to pay it back, he was allowed (granted) an extension of three days, during which the creditor was entitled to cut off bits of the cdebtor'sflesh.
8) Musicians were asked to play a song about love. Is it better “a song talking about love?”
9) Bassanio needed money to go to Belmont and court Portia properly. Antonio didn’t have the money to pay Shylock back.

1. "get" is fine.

2. good
3.perform would be better there.
4. good
5. good
6. good
7. Either "allowed" or "granted" would be fine.
8. A song about love is better.
9. good