I sometimes have trouble with my grammar, isn't it?
I sometimes have trouble with my grammar, don't I?
I sometimes have trouble with my grammar, have I?
I sometimes have trouble with my grammar, aren't I?

Sometimes I perfect
Sometimes I do perfect,
Sometimes I speak perfect
Sometimes I am perfect

but other times I don't, won't they?
but other times I won't, do I?
but other times I don't, will they?
but other times I'm not, aren't I?

my problem is spilling
my problem is spelling
my problem is ceiling
my problem is selling

I have to rely on my spill chock
I have to rely on my spell cheque
I have to rely on my spell check
I have to rely on my spill check

She sometimes has trouble mixing metaphors, aren't she?
she sometimes has trouble mixing metaphors, doesn't she?
she sometimes has trouble mixing metaphors, has she?
she sometimes has trouble mixing metaphors, didn't she?

Why doesn't we all try studying together, isn't it?
why don't we all try studying together, shall we?
why shall we all try studying together, don't we?
why don't we all try studying together, shall we?

How doesn't next week sound, didn't we?
How does next week sound, doesn't it?
How does next week sound?
How doesn't next week sound?

Shut up, isn't it?
Shut up, will you?
Shut up, won't it?
Shut up, don't you?