in summer holiday与this summer holiday的区别或者用法,为什么有的时候不用加介词?

in summer holiday or on summer holiday in summer holiday与this summer holiday的区别或者用法,为什么有的时候不用加介词? for the summer holiday 与 in the summer holiday 的区别是什么 for the summer holiday 与 in the summer holiday 的区别是什么这俩句英语的区别是什么 ( ) the summer holiday 填in还是on students have summer holiday in( )and( ) 什么do you do in summer holiday ______（in,on,at）summer holiday summer holiday summer holiday Summer holiday 在暑假 翻译在暑假是In summer holiday ,还是in the summer holiday Did you have a good time during the summer holiday.Did you()()in summer holiday Where did you _____in this summer holiday?Where did you _____(go)in this summer holiday? 是in summer holiday还是on summer holiday有没有规律?总结一下! We are always in holiday in the summer terms . Students in Beijing_____ (start)their summer holiday in July.一般现在时 Summer holiday is coming.I'm going to Hong Kong with my parents.I'm going there by bus.Summer holiday begins from July the 13th.I'm going to Hong Kong on July the 14th.I want to play and go shopping in Hong Kong.I'm waiting for the day.