помогите пожалуйста Correct the sentences if they are incorrect. Исправить ошибки если необходимо. 
• We have hired a DVD yesterday. ___________________ 
• Mary just started watching this comedy. ___________________ 
• They never saw a horror film. _________________

We hired the DVD yesterdayMary has just started to watch this comedyThey have never seen a horror film

We hired a DVD yesterday.Mary has just started ti watch this comedy.They have never seen a horror film.