How do you say 'is it fun?' 'was it fun there? 'are you having a good time?' 'is japan fun?' in japanese?

Question:

I know theres a lot^^ But i need help please~!!!

Answer:

Is it fun? それは面白いですか。 soreha omoshiroi desuka
was it fun there? そこは面白かったですか。 sokoha omoshirokatta desuka
Are you having a good time? 楽しんでいますか。tanoshinde imasuka
Is Japan fun? 日本は面白いですか。 nihonha omoshiroi desuka