English book for student /
autor, Rubén Chui Mena.
- La Paz, Bolivia : [s.n.], 2021
- 44 p. : il. col. ; 21 cm.
Bibliografía: p. 44.
Contiene: The present simple - The past simple - The future simple - The verb TO BE - The present continuous - Frequency adverbs - Be going to (afirmativo) - Be going to (negativo) - Be going to (interrogativo) - The present perfect (afimativo) - The present (negativo) - The present perfect (interrogativo)