Why not speak English more difficult,这句话对吗?

Why not speak English more difficult,这句话对吗? English can speak English 这句话对吗? Why everybody do not speak?---这句子对吗? I found English grammar dull and difficult.这句话对吗? Do you speak English and French?这句话对吗 slowly i speak english to the students这句话对吗 I can speak in English.这句话对吗? "Could you speak English?"这句话的语法结构对吗? why don’t you speak more english every day. please enter not more than 9 numbers这句话对吗 I don't speak english or I not speak english 是否正确?WHY? say speak good english 这句话对吗?如果对,请帮忙讲出理由,