1. one possibility would be ....
注意用虚拟语气的说法，一旦你说‘would’，你就是很‘建议’了。
类似的有should，might，could。
2. perhaps we should just.....
比较礼貌的说法，注意这里用了just，就更具商量性
3. if it isn't broken, don't fix it. 一句俗语，表示不必自找麻烦画蛇添足。
4. it's just an idea, but how about .....
很礼貌的说法，一般是和地位高的人提建议或者自己并不确定的情况下。
类似的也有：what about .....
how about 后面也可以加更多内容，如：how about u do the dishes and i watch TV?
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