I have a lot of experience on math teaching这句话语法上有没有错误?

I have a lot of experience on math teaching这句话语法上有没有错误? I have a lot of experience on math teaching这句话有没有语法上的错误? i put a lot of sugar on my coffee 这句话没有错误吧? 这句话语法上有没有错误? I have run out of food ,I must go to buy some.这句话语法上有错误吗? Bill has a lot of teaching experience ,has't he? "If it had rained , I would have gone out ."这句话有没有语法上的错误?作文里 Do you have a lot of work to do today?这句话有什么错误么 I saw him that was flying a kite just now这句话有没有语法上的错误? I'm prepared to do anything for you这句话语法上有没有错误? i can only eat in the restaurant.这句话有没有语法上的错误 I like to play game very much这句话有没有语法上的错误?