如何使用 "doing" 造句

1. What are you doing now ?
你现在做什么工作?
2. By doing so erdogan has once again captured the imagination of the region .
埃尔多安的这次行为再次激发了人们对这个地区的想象力。
3. He knew what he was doing .
他知道他在干什么。
4. The bar to not doing qe should be high .
不实行量化宽松政策的障碍显然很大。
5. Why are you doing this ?
你为什么要做这种事?