SentenceCoach

SentenceCoach lets learners type a sentence in Chinese characters and receive a minimal correction, a plain-English explanation of the grammar rule, pinyin, and a translation. The page states it is built for HSK, IGCSE and IB learners and anyone learning Mandarin as a second language. It also offers a set of learning and practice tools, including HSK vocabulary word lists for HSK 1-6, grammar and X vs Y guides, measure word lists, sentence structure guidance, HSK writing practice, a spot-the-mistake quiz, a daily grammar question, a pinyin and tone sandhi converter, an HSK text analyzer, and a Simplified-Traditional converter. The page notes that no sign-up is required for the checker, that checker feedback is AI-generated and can be wrong, and that users should not paste personal information.

Key features

• Checks Chinese sentences and suggests a minimal correction
• Plain-English explanation of the grammar rule behind each correction
• Pinyin and translation for corrected sentences
• Level selector for Any level and HSK 1 through HSK 6
• HSK vocabulary word lists for HSK 1-6 with pinyin, meanings, and Anki exports
• Grammar and X vs Y guides covering particles and confusable word pairs
• Measure word guide linking classifiers to nouns
• Sentence structure guidance on placement of time, place, and manner
• HSK writing practice with feedback
• Spot the mistake quiz based on teaching error examples
• Daily grammar question with streak tracking
• Pinyin and tone sandhi converter
• HSK text analyzer that highlights words by HSK level
• Context-aware Simplified and Traditional character converter
• Printable HSK worksheets and character practice sheet generator
• Embeddable widget and error-example data report

Best suited for

• HSK learners checking Chinese sentences
• IGCSE and IB Chinese learners
• Mandarin learners studying grammar and measure words
• Learners who want English explanations with pinyin
• Teachers checking important work (page advises verifying with a teacher)

Pricing

Free (the checker is described as free with no sign-up; no paid tiers are stated)