〈肯定文〉 Dick was teaching Jack basketball at 6 p.m. yesterday. 昨日午後6時、ディックはジャックにバスケットボールを教えている最中でした。 〈否定文〉 Dick was not [wasn't] teaching Jack basketball at 6 p.m. yesterday. 昨日午後6時、ディッ…