1. Words games and tile games depend on either luck or skill.
- words is adjective, describing games - games is a noun - and is a preposition - tile is an adjective, describing games - games is a noun - (I forgot what depends would be) - on is a preposition - either is a preposition - luck is a noun in this case - skill is a noun in this case
2. Mahjong, a tile game, is similar to some card games.
- Mahjong is a noun, it is a game - a is a preposition - game is a noun - is is a preposition - similar is an adjective to 'card games' - t is a preposition - card is an adjective to games - games is a noun
3. These games are popular among both children and adults.
-these is a preposition - games are a noun - are is a preposition - are is a preposition - popular is an adjective, describing both - among is adjective, describing both - both is an adjective, describing 'children and adults' - children is a noun - and is a preposition - adults is a noun
4. The tiles are engraved with complicated Chinese symbols.
- the is a preposition - tiles is a noun - are is a preposition - engraved is an adjective, describing symbols - with is a preposition - complicated is an adjective, describing symbols - Chinese is an adjective, describing symbols - symbols is a noun
5. People are always ready for an exciting contest.
- people is a noun - are is a preposition - always is a preposition - ready is an adjective, describing people - for is a preposition - an is a preposition - exciting is an adjective, describing contest - contest is a noun
6. Excited contestants will play far into the night.
- excited is an adjective, describing contestants - contestants is a noun - will is a preposition - play is a noun - far is an adjective, describing 'into the night' - into is a preposition - the is a preposition - night is a noun