ببخشید خوب متوجه نشدم (نشنیدم) چی گفتید

Sorry, I didn't quite catch what you said. 

ببخشید خوب متوجه نشدم (نشنیدم) چی گفتید

security deposit پول پیش (هنگام اجاره کردن)

an amount of money that you give to a landlord before you rent a house or apartment, and that is returned to you after you leave if you have not damaged the property  

Do you require a security deposit? 

That will come out of your security deposit. (come out of = کسر شدن از)

The security deposit is a month-and-a-half's rent. 

We require the first and last months' rent and a security deposit up front. (up front = از پیش)

The landlord demanded one month security deposit for rent, another for damage to the apartment, and one month rent in advance.
Landlords will often want a security deposit and two months rent in advance.

I think I'm out of gas

I think I'm out of gas. فکر کنم بنزینم تمام شده

Fix these 3 common pronunciation mistakes in English

http://takhtesefid.org/watch?v=660213204461 

Note especially the difference between "bow" (bend down to show respect) and "bow" as in "bow tie."

verbless clause

The verbless clause is a structure containing no verb element at all (either finite or non- finite), usually having a covert subject, but containing other expressions which can be identified as a part of predicate (subject complement or adverbial). 

www.novitasroyal.org/Vol_7_1/petrlikova.pdf