Придумать предложение в present perfect в котором говорится о действии, которое произошло, но мы не знаем когда. желательно с переводом. заранее .

Somebody has cut down the trees in the park.
кто-то вырубил деревья в парке

If i go to saint Petersburg i shall stay at that hotel
If you take a taxi you will come early
If we have a party we will invite Boris
I shall make jam if i buy some apples
They will visit London if they go to England
I shall write him a letter when find him address
He will has lunch in the office if he is busy
He will shout if he is angry
We shall soup for dinner if i have the time cook it
When i am ready to go i shall give you a call
I shall go there alone if you will be late
When i go shopping i shall buy a hat
If i am cold i shall put a cap
I shell tell him the news if i see him
If i am free tomorrow if i shall clean the window

If I go to St Petersburg,I shall stay at that hotel.
If you take a taxi you will come early.
If we have a party we shall invite Boris.
I shall make jam if I buy some apples.
They will visit London if they go to England.
I shall write him a letter when I find his address.
He will have lunch in the office if he is busy.
He shouts if he is angry.
We shall have soup for dinner if I have the time to cook it.
When I am ready to go I shall give you a call.
I shall go there alone if you are late.
When I go shopping I shall buy a hat.
If I am cold I shall put on the cap.
I shall tell him the news if I see him.
If I am free tomorrow I shall clean the window.