play chess和play at chess有什么区别
how do use "during" and "that time" Are these correct? Please correct it and explain. 1)During secondary school period, I liked to play chess. 2)During the secondary school period, I liked to play chess. 3)During period of secondary school time, I liked to play chess. 4)During the period of secondary school time, I liked to play chess. 5)That time I studied in secondary school, I liked to play chess. 6)That time I studied in secondary school, that time I liked to play chess.