你好,用直接宾语作主语时在间接宾语前加介词“to”：
“a computer”是直接宾语,而 us是间接宾语!
所以 A computer has been given to us
又如：
1．I'll give her a present for her birthday． （直接宾语） (give sth to sb)
A present will be given to her for her birthday by me．
2．She told me the news． （直接宾语） (tell sth to sb)
The news was told to me by her．