The two questions in my grammar book:
1)"Many people claim —— sundaes and many towns around the world
pretend —- birthplaces of ice creams.
A) to have invented / to be
B) to invent / to have been
2)It is quite common for a historic high-rise building — into a
A)Having been converted
B)To be converted
Could you explain?
Just as a follow-up to A.Brēza’s reply, I would add:
1) Many people claim to have invented sundaes and many towns around the world pretend to be birthplaces of ice creams.
The context is in the past (sundaes already created), but the claim was made and is still ongoing; hence the perfect tense is used.
The towns are currently pretending (yesterday, today, tomorrow) that they are the birthplace, which is not a one-time action like the creation of sundaes. “Pretend” is followed by to be because it is a catenative verb (?) in this context.
2) It is quite common for a historic high-rise building to be converted into a residential building.
Despite the use of the adjective “historic,” the context of the sentence is not about/in the past; therefore, having been converted would be incorrect because we are not talking about something completed but about a common practice today in the renovation of buildings.