“The crowd gave the guest a warm welcome ”里，就有双宾语。一个是直接宾语“a warm welcome” ;另一个是间接宾语“the guest”。
“The guest was given a warm welome by the crowd ”。
“We will offer any capable applicant a competitive salary.”要变成：
“A competitive salary will be offered to any capable applicant.”
“People generally feel that social workers are offering valuable services for the public.”这句子可以“it ”作为主语，然后，把名词分句移到句子后头去：
“It is generally felt that social workers are offering valuable services for the public.”
“Social workers are generally felt to be offering valuable services for the public.”
“We saw them go out”和“He made her work”这两句话里， “go out”和“work” 不带“to ”，但是当它们变成被动句时，“ to ”出现了：
“They were seen to go out.”和“She was made to work.”
①灯关掉了：The light was turned off (不是：The light turned off)
②会议延期举行：The meeting will be put off. (不是：The meeting will put off)
③这件事必须保密：This matter should be kept secret.(不是：This matter should be secret)
④发展计划提早完成：The development project was completed before schedule.
⑤我们学校去年建造了一个新的电脑室： Last year, a new computer room was built in our school.
⑥在旧社会，妇女是受轻视的：In the old society,women were looked down upon.