# 1选择型Which sentence uses the simple past tense correctly?I am going to the store yesterday.I went to the store yesterday.I will go to the store yesterday.I am went to the store yesterday.
# 2选择型Identify the sentence that uses the past continuous tense:She was singing when I arrived.She sings when I arrived.She will sing when I arrived.She sang when I arrived.
# 3选择型Which of these sentences is in the past perfect tense?I have finished my homework.I had finished my homework before dinner.I will have finished my homework.I finish my homework before dinner.
# 4选择型Choose the sentence that uses the past perfect continuous tense:They have been playing for hours.They had been playing for hours when it started to rain.They are playing for hours.They will be playing for hours.