Question

My family consider ——a computer, which is considered ——a great help in our work and study.

A. TO buy ,to be B.buying ;being C. buying;to be 我知道make sb do 变成被动的话是be made to do
但我问过初中老师 有动词+doing 的话被动是be +动词被动形式+doing 的...
但这一题不是是 considere doing吗 按初中老师说的话被动是be considered doing

问 have sb do 和have sb doing 怎么变被动....
求解释

Answer 1

此题与have sb do 和have sb doing 一点不沾边.
答案: C. buying;to be
第一空考查: consider doing sth. 考虑做某事
第二空考查: be considered to be... 这是固定搭配,与be considered as同义.意为" 被认为是..."
have sb do 和have sb doing 怎么变被动? 这种情况我从来没见过, have 作使役动词时,一般用主动语态,不用被动语态的. 倒是make作使役动词时有被动语态.如:
The boss made him work nine hours a day .
He was made to work nine hours a day by the boss.

Answer 2

这个句子是非限制性的定语从句. 第一个空是 consider doing 考虑做某事
第二个空是 consider being

句子意思是: 我的家人考虑去买台电脑,那电脑被认为是我们工作和学习的一个大帮手.

The computer is considered being a great help in our work and study.

have sb do 让某人做某事

have sb doing 然某人做事,强调经常 反复做某事
他们都没有被动语态.