关于视频 Simple Past
simple past (9)
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verbs (88)
past tense (29)
present perfect (54)
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simple present (12)
present continuous (24)
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prepositions (50)
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pronunciation (217)
english grammar (193)
esl (155)
adjectives (46)
ingles (62)
present progressive (6)
past simple (28)
past perfect (32)
ielts (129)
toefl (77)
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