be to do

• His book is to do with human behavior
  他的书是关于人类行为的。
• What tom wants is to do his field work
  汤姆想的是作他的野外实习
• It is a kind of passion of being to do my own enjoyable thing
  能够做自己喜欢的事情，是一种热情
• To do two things at a time is to do neither
  次做两件事等于未做
• What a child should do , above all , is to do well in his studies
  小孩子该做的最重要的事是学好功课
• If we are to do this , ed and i need you to be straight with us
  如果这么做，艾德和我需要你们坦白
• You just don ' t understand how hard it is to do well in school
  你就是不知道要在学校里做好有多难！
• Politeness is to do and say the kindest thing in the kindest way
  文雅就是善良地做事，和善地说话。
• Tell me what i am to do for this .
  告诉我怎样才能得到它。 ”
• Either you or i am to do the work
  要么你,要么我做这项工作。