[hela]

Dear teachers,

Sorry to insist but I've had so many interpretations and views that I don't know what what I should do / write in the end. Would you please give me a definite (if possible) answer to the following questions?

1) Is it acceptable in written English to say:

a) My My mother looks younger since she dyed her hair.

b) My mother has looked younger since she dyed her hair.

c) Until when are you going to stay here.

2) How would you justify the use of the present with "since" in the following sentences?

a) Since when (standard ?) do you have the right to tell me what to do?

b) My kids think that the cell phone is the greatest thing since sliced bread.

Is the use of the present allowed with stative verbs? Why?

Thank you very much for your patience.
Hela