I can't catch him. He rans so___(快）

I can't catch him. He rans so___(快） he runs so fast i can't catch up with him.（改为同义句） i don't believe he can catch up with me,--------?为什么用can't h Dr.Li si so___(careful) that he can't make any mistakes. he ran so fast that i con't catch up with him he ran very fast ,i couldn't catch up with him 同义句转换 He ran so fast that I couldn't catch up with him but he can't catch the ball He can't be home now, for I saw him (He is lucky,i can't forget him. He runs so fast that nobady can catch up with him.(改为简单句） He runs so fast that I couldn't catch up with him.是不是错了 用cou