Tag Question With Need?

need is a normal verb in the affirmative, a normal or modal verb in the negative.
(Don't forget to change the affirmative-negative polarity in the tag.)

You need money, don't you? [normal; affirmative]
I needn't do that, need I? [modal; negative]
I don't need to do that, do I? [normal; negative]

CJ

CalifJimneed is a normal verb in the affirmative, a normal or modal verb in the negative.
(Don't forget to change the affirmative-negative polarity in the tag.)

You need money, don't you? [normal; affirmative]
I needn't do that, need I? [modal; negative]
I don't need to do that, do I? [normal; negative]

CJ

So that means I can write:

I needn't do that, need I?

right?

Yes. All three examples I gave are correct.

CJ

So, how about:

I have to do this, don't I?

or

I have to do this, haven't I?

and

I must do this, musn't I?

or

I must do this,do I?

Use these:

I have to do this, don't I?
I must do this, mustn't I?

CJ

how about
He needs to go now, needn't he?
or
He needs to go now, doesn't he?

Strictly speaking:

He needs to know now, doesn't he?
No one need know now, need they?

Hi, Can you help me with this?

"You need no extra cash, do you? ... or, don't you?

Thanks!

Daniela