I have a question if most of the sentences in present perfect simple can be replaced by present simple because it helps me to distinguish between present perfect simple and past simple.
e.g. I've bought a new bicycle. = I have a new bicycle. Is this method correct or not?
I guess Tom3m is trying to find a connection of an event with the present time or a result that a finished action has now.
I've broken my leg = my leg is in plaster and I cannot play football today
Nick's gone to the shops = he is there or on his way there
I've seen this film = I know what it is about and can comment on it
It seems to me all sentences that use the Present Perfect can be rewritten this way; however, I don't believe it's a good method to distinguish between the present perfect and the past simple. Here:
I had lunch fiften minutes ago = I'm not hungry now
You could also say I bought a new bike (yesterday) = I have a new bike.