you should believe that native speakers will not laugh at yo

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不是.laugh也是动词.因为这是个宾语从句,主句里动词是believe,从句里动词是laugh.而且这句话也有点问题.believe,think等词引导的从句中要是否定,否定要提前.所以这句话这样比较恰当.you should not believe that native speakers will laugh at you.