haver de

Verb

 * 1) must, to have to requirement, obligation; auxiliary verb followed by an infinitive
 * 2) must probable, certain; followed by an infinitive
 * 1) must probable, certain; followed by an infinitive
 * 1) must probable, certain; followed by an infinitive

Conjugation
As, but with alternative 1st person singular form.

Verb

 * 1) will; shall
 * 2) to have to; must