2) past progressive/continuous

V. Verbs
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A. introduction to the types and forms of verbs
B. three major types
C. six major forms
D. other verb types and related aspects
E. tenses
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1. verb tenses (overview)
2. simple present & present progressive/continuous
3. simple past & past progressive
4. simple future & future progressive
5. perfect & perfect progressive
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a. simple past: basic rules and forms
1) affirmative, negative, questioning, and answering forms
2) spelling and pronunciation for regular verbs
3) irregular verbs
4) "be" / there + "be"
5) with time words/phrases/clauses
6) “used to” + V (for past habits)
7) simple past vs. present perfect
b. past progressive/continuous
1) past simple vs. past progressive/continuous
2) past progressive + "while" or "when" clauses
c. (supplementary) past participle
d. (supplementary) future in the past
# videos: on the following subpages

a) past simple vs. past progressive/continuous
b) past progressive + while or when clauses

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English Grammar (video teaching)