Ex1 . bài  tập về các thì 
1. I (learn) english for seven years now
2. but last year I (not / work) hard enough for english , that's why my marks (not / be) really that good then
3. as I (pass /want) my english exam successfully next years , I (study) harder this term
4. during my last summer holidays , my parents (send) me on a language course to london
5.It (be) great and I (think) I (learn) a lot
6.before I (go) to london , I(not /enjoy) learning english
7. but white t (do) the language cairse, I (meet) lotsofyouing people from all over the world