Changing times, changing tenses :
Peterson, Patricia Wilcox.
Changing times, changing tenses : a review of the English tense system : elementary / intermediate / by Patricia Wilcox Peterson. - Washington, D.C. : United States Information Agency, 1995. - 155 p. : ill.
Includes cassette "Changing times, changing tenses" (AUA-PL-0005656).
English grammar.
English language--Study and teaching--Foreign speakers.
Changing times, changing tenses : a review of the English tense system : elementary / intermediate / by Patricia Wilcox Peterson. - Washington, D.C. : United States Information Agency, 1995. - 155 p. : ill.
Includes cassette "Changing times, changing tenses" (AUA-PL-0005656).
English grammar.
English language--Study and teaching--Foreign speakers.