1) 主语+ cannot emphasize the importance of too much.(再怎么强调的重要性也不为过。)例如：We cannot emphasize the importance of protecting our eyes too much.我们再怎么强调保护眼睛的重要性都不为过。2) There is no need for sb to do sth. / for sth.(某人没有必要做)例如：There is no need for you to bring more food.不需你拿来更多的食物了。3) By +doing，主语+can . (借着，能够)例如：By taking exercise, we can always stay healthy.借着做运动，我们能够始终保持健康。4) enable + sb.+ to + do. (使能够)例如：Listening to music enables us to feel relaxed.听音乐使我们能够感觉轻松。
