if后不加能加or not 课本上说不能,但一个外国人说i don't know if you are studying or not,为什么不是说的,是写下来的

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if后不加能加or not 课本上说不能,但一个外国人说i don't know if you are studying or not,为什么不是说的,是写下来的 if与or not可以连用吗?先看一个题,答案上选A,I wonder( ) I will catch the last bus or not.A.whether B.if可是我查了许多语法书,有些说whether/if都可以与or not连接使用(whether/if…or not),只是if不能与or not 为什么if后面不能or not,whether可以 宾语从句中if与or not可以连用吗先看一个题,答案上选A,I wonder( ) I will catch the last bus or not.A.whether B.if可是我查了许多语法书,有些说whether/if都可以与or not连接使用(whether/if…or not),只是if不能 if是不是后面不能跟or not?那么能不能跟形容词加or加反义词?or加反义词不就等于是or not? if 能不能与or not连用?She tells me___my pictures are good or not.这道题填whether更正确,可是能不能填if?我听说if不能与or not连用 if.or not的意思 whether or not呢? if.or not的意思whether or not呢? Wether or not和if or not那个句型对. Ask her if she will go with us.为什么不能选if or not she will/that if she will/whether will she麻烦解释的详点. if not和whether or的区别 whether or not可以完全换成if? if 和or not可以连用吗 有没有 It doesn't matter if .or...(不是or not)这样的if引导的主语从句例子.或者说它对不对. I am not sure if it will be fine or cloudy?我知道if不能和or not连用,但if能与or连用吗?比如:The police are not sure if the child has been kidnapped or killed.这句话是否正确? 宾语从句中if与 or not可以连用吗?如题 先看一个题,答案上选A,I wonder( ) I will catch the last bus or not.A.whether B.if可是我查了许多语法书,有些说whether/if都可以与or not连接使用(whether/if…or not),只 If happy or not depends on myself,If happy or not depends on myself, I never doubt ( ) this exhibition is worth visiting or not.A if B that c whether 说一下为什么