words to describe something that are useful and not useful/practical we buy different things, some are very useful and we use it every day, whereas some are maybe just novel and trendy or has some gimmick or fancy features that compelled you to buy, but it is not really useful to you and you were probably just buy-in the idea or follow the trend/fashion, and later realize that you don't really need it that much after the novelty wears off. sadly the only words that come to my mind are​ "userful", "unuseful", "practical", etc, which sounds ok but does not have a very native feeling to me. can someone please suggest some words to describe it? be it noun or adverb.

日本語の練習（九月二十三日） これは日本語の文章を練習します。（実な意味を理解されりますから、英語の翻訳はあたらせられます）。 以下。 following is some practises on Japanese sentences. I attached the English translation so that you can understand what do I actually mean) 私は料理がだいすきです、でも、食料を買って、準備して、料理して、たくさん時間が掛けますから、大切な日付じゃないかぎり、料理を作らないです。 I love cooking but it takes too much time to buy the groceries and prepare and cooking. so I do not usually cook unless it's a very important date. 私は、ジョギングしていますながら、日本語のラジオをきいています。 I listen to some Japanese radio when I am running オスとラリアが好きですなら、きてください。 if you love Australia please come to visit なんどもお金を稼いた、いつも社会にちょうど貢献されますよ。 it doesn't matter how much money you make, you can always contribute a little to the society.

世界の終わりが私は大好きなバンド 最近、私は日本語を真面目に勉強した。だが、日本語の教科書は面白くないと思う。じゃあ、新しい学習方法を試みた。英語を勉強する時に、色々音楽と映画は大切な助けだ、日本語が同じと思うから。では、日本語の歌を探索した。世界の終わりはとても変な名前だね。でも、彼たちの音楽は綺麗だ。花鳥風月は私の大のお気に入り、なぜなら歌詞が綺麗だ、そして、使うの言葉はあさしだ。

Sex in the beach or sex on the beach? sometimes I find it difficult to differentiate the use of in and on. can anybody help me clarify a little bit? From the textbook I guess it should be "on" but if you goggle, you can find both. this maybe a little off topic but looks like English itself has been evolving overtime, especially since internet age. some mistakes are tolerated and become a part of the language as English people engages ESL people more. what'

スドニの天気 このごろ，スドニの天気わ全然よくなかったです，どこにでもは暴風と雨です。私は今日働きませんでした

The use of Kanji and Hiragana Hi guys, I am quite confused on the use of kanji for example, あります　有ります　 now that they have the same pronunciation, do they mean the same thing? if it's the case, why do we have 2 way of writing it? also we have similar cases: きます　and 来ます pronounce the same however 行きます never write as 行来ます is there any rule on the use of kanji? the other questions is 今日 , it's pronounced きよう, I am confused on each kanji's pronunciation, because in Mandarin each 漢字 characters has a relatively fixed pronunciation, as far as I know 今 pronounced いま　while 日 pronounced にち individually. so I suppose 今日 should be いまにち, but in this case, seems like it does not work that way. so 今　is pronounced き　and 日　is pronounced よう?? or they have this pronunciation only when they are bound together?