Have to for obligation and need to for necessity
 Modal Verbs of Obligation and Necessity        1. Use of Modal Verbs of Obligation and Necessity   Modal Verbs can be used to talk about obligation, freedom and necessity to do something. We use the following modal verbs:   Must ,  Have to ,  Need to ,  Don’t have to ,  Needn’t, Don’t Need to  +  infinitive   2. Talking about Obligation and Necessity in the present   2.1 Obligation    Have to  and  must  are both used to express obligation. There is a slight difference between the way they are used.   Have to  shows us that the obligation comes from somebody else. It’s a law or a rule and the speaker can’t change it.   In Britain you have to wear a seat belt when you drive    Must  shows us that the obligation comes from the speaker. It isn’t a law or a rule.   I must finish this before I go home    Sometimes if the speaker agrees with an external rule they will use must   In Britain you must wear a seat belt when you drive.    Nee...
Comentarios
Publicar un comentario