Xがあります/ います

Xがあります means "there is/there are X (non-living things)." The particle が introduces item X. You can also use ありますto say that you have or own something or that and event will take place.

あそこにマクドナルドがあります。 There's a McDonald's over there.

テレビがありますか。 Do you have a TV?

あしたはにほんごのくらすがありません。 There will be no Japanese class tomorrow.

When you want to present or some sentient being, rather than a thing, you need to use the verb います.

あそこにりゅうがくせいがいます。 There is an international student over there.