You can do this before class ,and you can also do it after c

You can do this before class ,and you can also do it after c you can do it in class .you can also do it at home(句意不变） you can you do this? You can do it （l ） this. You can do it ---- this A. you can do it this way 用法 You can do it You Can Do It! You can do like this. I hope you also can do Can you do this?-- I can Can you do this?'---'l can t()()!