This was my go-to page at the early stages of learning Mandarin. Chinese Grammar Wiki has an articles of each of the main aspects of Chinese grammar. For example, there are articles on how to use 一下, 在, 要, 就是, 才and many other Mandarin grammar points. Each word gets its own article with examples in pinyin and characters and, of course, English translations. You can also get website as a physical book or an ebook.

Grammarsen is a desktop app that automatically corrects your selected text using chatgpt, helping you stay focused. No more copy pasting and switching tabs. Simply select some text, press a hotkey, and see the old text gets replaced with the corrected version. Grammarsen saves time for students, writers, marketers, english learners, and anyone who types a lot.