問題 1短答式What is the structure of the present continuous tense?S+am/is/are+verb-ingS+tobe+VingS+tobe+verb-ingSubject+tobe+verb-ingSubject+is/am/are/+verb-ing
問題 5短答式Which word is usually used with the present continuous tense to indicate the time of action?now
問題 13短答式What is the negative form of 'You are studying' in the present continuous tense?You are not studying