Changing a sentence into the passive when the active verb is in the past perfect tense
UNIT 5 THE PAST PERFECT & THE PAST SIMPLE
Thì quá khứ hoàn thành thì quá khứ hoàn thành tiếp diễn (the past perfect the past perfect continuous)
17389 the past perfect continuous tense
61840 time expressions with the past perfect
the past perfect simple tense
verbs in brackets
A study of the linguistic features of suggestion verbs in english and their vietnamese equivalents