Упражнение 2 предложения 3,5,6,8

1: I would know English like americans

2: I would have been a great scientist

3: I would visit India now

4: I would drive my new bysicle all day

5: ?

6: I would had breakfast

7: I would (get - это слово должно быть во 2ой форме) bad mark

8: I would bought present for my mom