请问有why to do sth吗? Do you know （）to take care of your ears? A.why B.how下文交代的是为什么这样做是不是是why

请问有why to do sth吗? Do you know （）to take care of your ears? A.why B.how下文交代的是为什么这样做是不是是why 请问：这两种说法有什么区别?一个是Why don't you do sth.一个是Why do you not to do sth.还有How could you not to do 和 How couldn't you do agree to do sth agree to do sth有吗? why not doing sth还是why not do sth还是why not to do sth why not to do sth对吗?waiting 我们老师经常说什么：Let sb do sth,try to do sth,want doing sth等请问,一句英文后什么时候接do sth ,to do,或doing sth,这有什么规律吗? 22题,不是有why not to do sth why don't you do sth22题,不是有why not to do sth why don't you do sth 的句型么? why not后面是doing sth还是 to do sth be adle to do sth与can do sth的区别请问be adle to do sth与can do sth有什么区别? hear sb do sth和doing sth有什么区别有to do sth吗 请问be supposed to do sth 与 should do sth 有哪些区别呢? feel like to do sth有吗? feel like to do sth有吗? 有promise sb to do sth吗 take to do sth有吗? 请问want sb to do sth和 ask sb to do sth一样吗 请问大师:有 promise sb.to do sth. have sth to do with sth和have got sth to do with sth有区别吗