He tried to open the door and (free/freed)the bird.

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Hetriedtoopenthedoorand(free/freed)thebird.Hetriedtoopenthedoorand(free/freed)thebird.Hetriedtoopent

He tried to open the door and (free/freed)the bird.
He tried to open the door and (free/freed)the bird.

He tried to open the door and (free/freed)the bird.
是动词圆形的feed,喂鸟
这里的and,其实是he tried to open the door and tried to feed the bird
省略了第二个tried to