i could catch the ball怎么改成否定句?

i could catch the ball怎么改成否定句? kick the ball ,piease.改成否定句 Shw can catch the ball ver well.要怎么变成否定句? 将could you please hold the ball改为否定句 Could you plase hold the ball?【改为否定句】 连词成句but he he He thought could coulen't the catch ball Catch the ball and throw it to Ben.改否定句 I am ready to catch the ball I can touch the ball改否定句 Could you please open the window改成否定句 chase the chicken.怎么改成否定句? catch the ball意思