TY  - BOOK
AU  - Azar, Betty Schrampfer
TI  - Understanding and using english grammar / Betty Schrampfer Azar
KW  - 1. EDUCACION  2. LENGUAS  3.  LENGUAJE Y LENGUAS - ENSEÑANZA 4.  LENGUAJE INGLESA
N1  - Question; singular and plural; modal auxiliaries; the passive; verb tenses; using verb tenses; pronoun agreement; conjuctions; noun clauses; adjetive clauses; gerunds and infinitives
ER  -