Найти ошибки в предложениях 1-He can speak the french

Найти ошибки в предложениях 1-He can speak the french. 2-He don't know German. 3-They live in the China.4-She didn't knew that man.5-I am not understanding the teacher.6-The children aren't sleepinq,aren't they? 7-He can plays computer games.8-We don't know his.9-She send him e-mails every day.10-Did Robin wrote a letter to his friends? 11-If Misha will not help Robin , Robin will not go back to his time.12-There are much salt in the soup.13- Everybody like to swim in the sea.14-You had to help her,didn't you? 15-His grandfather was an old brave man.16-They'll go to Black Sea next year.17- The longest river is Nile , isn't it? 18-I was seeinq him at 6 o'clock yesterday.19-There is no life on the Moon .20-Misha had met Robin before he met Rob 21- Have you ever seen Tsar Bell? 22-Is a torch cheaper then a penknife? 23-Who is the best football player in your class? 24- We watched TV when they came 25- What you were doing yesterday at 5 o'clock? 26-They had been in London last year.27-What have you already did? 28-We never have played this game. Помогите пожалуйста (умоляю (