1/ They have just sold that old house
⇒That old house__has just been sold by them
2/ In spite of the bad weather, they had a wonderful holiday
⇒Although___the weather was bad, they had a wonderful holiday
3/ They will build a new mall here
⇒A new mall_____will be built here by them
4/ Unless he takes these pills, he won’t be later
⇒If__he does not take these pills, he won't be better