一句英语句子的问题The gaoler decided to play a joke on his colleague

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/11 00:54:24

一句英语句子的问题
The gaoler decided to play a joke on his colleague to find out if,after so many performances,he had managed to learn the contents of the letter by heart.
为什么要再if的后面加逗号,语法不是很懂.

after so many performances 是插入语,为了方便理解,插入语可以先提出来,原句变为The gaoler decided to play a joke on his colleague to find out if he had managed to learn the contents of the letter by heart.
插入语不占句子成分,前后都加逗号,更方便观察出某部分是插入语.

One night,the gaoler decided to play a joke an his colleague 英语翻译on April 1st ,Mike decided to play a joke on his friends One of the villagers learned this and decided to play a joke play a joke on 英语语法the gaoler looked on eagerly,anxious to see if his fello they came along and started to play a joke on him.(保持原句意思） play the joke on sb play a joke on sb play a joke in与play a joke on 的区别是play a joke on还是play a joke with play a joke on 和 make a joke about的具体区别,并举例说明英语连词成句!a,on,you,play,not,don't,people,joke,don't,kno