不得不说一句,楼上的两个把not改成don't的建议,都是不对的.
应该是"not bending...but focusing...",这里not..but...是并列结构,把用动名词形式做动宾式主语比较好.
不介意的话,我来帮你修改一下吧.除了一些动词、动名词、单复数的小错误外,我觉得还有更顺畅的方式表达你的意思.
另:我不是特别清楚bend的所有用法,但真的没有见过用在眼神上的.
1 Focusing on something other than the people you speak to betrays your neglect,cold or absent-minded manner.
2 Looking at people with smile means you are matey,and looking at people with frown expresses your worries or sympathy.我不知道你是不是要用fix代表什么强烈的“盯着”之类的意思,但look at显得更自然、更常用一些.
3 Knowing these rules well would help you have better eye contact with someone you are interested in.