... title of “A contrastive analysis of passive voice between English and Vietnamese .” There are several studies of the passive voice in English and the passive contrast between English and Vietnamese. ... difficulties hindering the Vietnamese acquisition of English, the concepts of voices in general, passive voice in particular seems to be one of the core issues. In this paper, the concepts of voice and ... bare –infinitive clauses, causative verbs ( have, let, make) take a bare- infinitive in their infinitive clauses but "make" takes to- infinitive. The two following pairs of sentences...