English2A

COMPARATIVO Y SUPERLATIVO DE LOS ADVERBIOS Con los adverbios terminados en  -ly , se utiliza  more  para formar el comparativo y  most  para formar el superlativo. Adverbio Comparativo Superlativo quietly more quietly most quietly slowly more slowly most slowly seriously more seriously most seriously EJEMPLOS The teacher spoke  more slowly  to help us to understand. Could you sing  more quietly  please? En el caso de adverbios cortos que no terminan en  -ly , las formas comparativas y superlativas son idénticas a los adjetivos: se añade  -er  para formar el comparativo y  -est  para formar el superlativo. Si el adverbio termina en  e , se elimina esta última vocal antes de añadir la terminación. Adverbio Comparativo Superlativo hard hard er hard est fast fast er fast est late lat er lat est EJEMPLOS Jim works  harder  than his brother. Everyone in the race ran fast, but John ran the  fastest  of all. Ciertos adverbios tienen formas irregulares en

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. Need to  have to and need to are often used in the sa