1) single 单身  Being single sucks. I wish I had a boyfriend. 单身的感觉真不好。好想找个男朋友啊！ 
2) bachelor 单身汉3) bachelorette 单身女子 Before getting married, people have bachelor or bachelorette parties to say goodbye to being single. 结婚之前，人们会举行单身汉派对来告别单身