climb a mountain (?)
Have you ever climbed a mountain?/ Have you climbed a mountain?
eat a mango (+)
I have eaten a mango.
go ice skating (-)
I have never gone ice skating./I haven't gone ice skating. I have not gone ice skating.
mail a letter to another country (?)
Have you ever mailed a letter to another country? Have you mailed a letter to another country?
play the violin (+)
I have played the violin.
see an elephant (-)
I have never seen an elephant./ I haven't seen an elephant./ I have not seen an elephant.
visit a castle (?)
Have you ever visited a castle? Have you visited a castle?
swim with dolphins (+)
I have swum with dolphins.
