可不可以说DId you erver do sth

可不可以说DId you erver do sth 可不可以说welcome sb to do sth 可不可以说make no differences to do sth help sb.do sth.可不可以说成 help sb.to do sth.please help me! 可不可以说What colour do you like about? 可不可以说What time do you get up at? 可不可以说How well do you like it? thanks for doing sth可不可以说成thanks for you doing sth how ofen do you do your exercises 可不可以说how do you exercises? Do you know how to go to Beijing?可不可以说：Do you know how you w 可以说mind to do sth. How often do you have science classes?可不可以说成How often scienc