They have promised to compensate the villagers, and we believe that they will (compensate the villagers.)
“Is she happy?”
“I think she is happy.”
I like eating cakes and like making cakes.
I like eating and making cakes.
省略前置
省略与助动词
Do so
I need to speak to Anna. I’ll try to speak to Anna tomorrow.
He promised to paint staircase but he hasn’t painted the staircase.
He promised to paint staircase but he hasn’t
He promised to paint staircase but he hasn’t done so.
I love the saxophone, and I always have loved the saxophone. 这个是经常发生的行为,而不是故意的行为,不能用 do so