Change into passive: cứu tớ với

`8` The articles which customers have bought during the sale cannot be exchanged 

`9` This man mustn't be moved, he's too ill

`10` When this street has been widened, the residents will be kept awake all night by the roar of the traffic 

`=` When they have widened this street, the residents will be kept awake all night by the roar of the traffic 

`=` When this street has been widened, the roar of the traffic will keep residents awake all night

`12` The accident ought to have been reported to the police

`13` It must be dry-clean

`14` After that they should be returned 

`15` He will have to be left here 

Cấu trúc

`->` S + tobe + Vpp (+ by sb)...

@newspacelucy