As a native speaker, it's more common to say, read, and hear: I would like to thank my partner Alex, who has always been by my side through thick and thin. And I don't feel that "thick and thin" is too casual in this case because book dedications are very personal and provide a sentiment that is very genuine. They are formal yet heartfelt from the author. Hope that makes sense. Best wishes :)

Your first sentence is perfect! :) For number 2, simply delete the word “his” For number 3, I would say “Please, rephrase your question so that I may better understand. ( This is more formal...a more casual phrase would be in the form of a question...”Could you please rephrase your question? I’m afraid I don’t understand.” Hope that helps you—best wishes:)

I agree with John's advice. I would also add that you may want to consider staying in one tense for your statement. For example: "showed" (past tense) or "shows" (present tense)...or stay in the past tense with "ed" endings. Otherwise, I agree with John's advice as well. Good luck with your report. :)

Unfortunately, no. The message is very unclear. Tell me a little more about what you are trying to express and I will help you. Best wishes :)

Yes—your point is very clear. I couldn’t agree with you more. Language is alive in all of us and I believe you are right to say we need to fall in love with it to truly learn, understand, and communicate...bravo! :)

If you’d like to improve your business English, I would recommend the following: 1) Read the business section of major newspapers such as the Wall Street Journal and New York Times. As you read, even if you don’t understand, write down words from the articles and look them up. Then, make a list or cards from those new vocabulary words. It’s a good idea to write two synonyms for the same word and learn those as well because native speakers and text will use alternative words. This will expand your knowledge and vocabulary. 2) Download and listen to an English Business Podcast. Research this first and read reviews online for one that best suits your need. Such as: Technology or Finance. 3) Write a paragraph or two each week using your new vocabulary words from step one above. Post your paragraphs as a “Notebook” here on iTalki and have native speakers review it for you. 4) Ask a native speaker to be your “partner” on iTalki and set up some online sessions to practice your speaking skills. Most of all have fun and practice often! Best wishes to you. :) ビジネス英語を改善したい場合は、以下をお勧めします。 1）Wall Street JournalやNew York Timesなどの主要新聞のビジネスセクションを読む。 読みながら、理解できなくても、記事の単語を書き留めて調べてください。 次に、それらの新しい語彙の単語からリストまたはカードを作成します。 ネイティブスピーカーとテキストは別の単語を使用するため、同じ単語に対して2つの類義語を作成し、それらを習得することをお勧めします。 これにより、知識と語彙が広がります。 2）英語のビジネスポッドキャストをダウンロードして聞いてください。 最初にこれを調査し、あなたのニーズに最適なレビューをオンラインで読んでください。 など：テクノロジーまたは金融。 3）上記のステップ1の新しい語彙を使用して、毎週1つか2つの段落を書きます。 ここでiTalkiに段落を「ノートブック」として投稿し、ネイティブスピーカーにレビューしてもらいます。 4）ネイティブスピーカーにiTalkiの「パートナー」になるよう依頼し、オンラインセッションを設定して、スピーキングスキルを練習します。 何よりも、楽しくてよく練習します！ よろしくお願いします。 :)