答:consider后可以接doing，不可接to do，可以接consider someone to have done something(认为某人做了某事)

consider做"打算"讲，后接非谓语动词doing，意思是打算做某事，例如:

Mike considered going picnicking with his friends this weekend.

consider做"认为"讲，后接consider someone to be 或consider someone to have done something，例如:

We all consider the boy to be honest.

We consider the boy to have done a good deed.

Considerdoing和todo的区别

正常情况下没有consider to do sth的写法，只有consider doing sth。只有在被动时才有be considered to do，此时是“认为”的意思。

例句：China is considered to be one of the greatest country in the world.翻译中国被认为是世界上最伟大的国家之一。

consider doing sth是“考虑做某事”的意思。

例句：I am considering going or not.翻译：我正在考虑去不去。

consider to do是认为的意思.

例:China is considered to be one of the greatest country in the world.中国被认为是世界上最伟大的国家之一.

consider doing 是考虑的意思.

例:I am considering going or not.我正在考虑去不去