表示时间的介词in,on
at:一、介词in:1
in+一天中的早、中、晚:inthemorning,in____________________in____________________________2
in+某月:inoctober,in___________,in______________,in__________,in____________,in___________,in_____________,in______________,in____________,in____________,in_____________,in________________
in+某季节:inwinter,in___________,in____________,in____________
in+某年:in2015
二、介词on:1
on+某星期:onMinday,on________________,on_________________,on_________________,on_________________,on________________,on_____________
on+具体某一天:on16thoctober,on________________________
on+具体某一天的早、中、晚:onMindaymornig,on_______________________,on______________________,on_______________________,on_____________________________,on________________________________on_____________________________
onacold______________,on_________