Free for a limited time · No translation points consumed
English grammar analysisLabel subjects, predicates, objects, attributives, adverbials, complements, clauses, tense and voice
English long-sentence analysis · three-level breakdown · select text on a web page to analyze · available in Word and the web version
The long and difficult sentences in postgraduate entrance exam reading and IELTS TOEFL are often not due to lack of vocabulary, butSentence components unclear. When reading an English web page, select a sentence to see its main clause, modifiers and clause layers. In Word, selected text is analyzed the same way.
Recommended · Chrome/Edge
In addition to full-page bilingual comparison, the TopCopilot AI Translation Assistant extension also includesgrammar analysis: select an English sentence or word on a web page and it opens automatically in the analysis panel, matching results from the Word add-in and web version. The extension also supports selected-text translation, a word dictionary and four translation engines. With the Windows add-in and web version, use thesame account and credits。
Install TopCopilot AI Translation Assistant from Microsoft Edge Add-ons (coming soon to the Chrome Web Store).
When browsing an English web page, click the extension icon, open the sidebar and sign in (same account and credits as the Windows add-in and web version).
Select an English sentence or word on a web page and it opens automatically in grammar analysis in the sidebar; long, complex sentences also support a three-level breakdown.
Windows add-in
After installing TopCopilot, open the "Grammar Analysis" panel in the Word / WPS ribbon. Select the English in the document, and the sidebar will automatically be brought in and the analysis will begin - the phonetic symbols and definitions of the words will be displayed, the component annotation and three-layer progressive decomposition of the sentences will be displayed, and a large window can be opened with one click for intensive reading.
Download the TopCopilot Windows installation package, close Word completely and then install it. Reopen Word, open the sidebar on the "AI Assistant" tab and log in.
Click Grammar Analysis on the ribbon to switch the sidebar to the grammar-analysis panel (free for a limited time; no translation credits used).
Select an English sentence or a single word in the document, and the selection will be automatically synchronized to the sidebar and analysis will begin; you can also paste it manually and click "Start Analysis".
Results follow the sentence-component system commonly used in Chinese English classrooms. They are not a free-form natural-language explanation with unclear structure.
Select an English sentence in the browser extension and the sidebar opens and starts analyzing it automatically. The Word add-in also analyzes selected text and can open a large close-reading window with one click.
Components are labeled using the subject, predicate, object, attributive, adverbial, complement and predicative system commonly used in Chinese English classrooms. No conversion to unfamiliar English grammar terminology is required.
Identify subject/object/predicative/appositive clauses, attributive clauses and 9 types of adverbial clauses. Modifying structures such as participle phrases and infinitive phrases will also be classified and displayed.
Automatically summarize sentence type (simple/compound/complex/compound-complex), tense and voice; passive sentences also identify retained objects.
Long and difficult sentences are unfolded layer by layer according to the three levels of "main → modification → clause". First grasp the skeleton and then look at the details, which is in line with the learning habit of deconstructing long and difficult sentences.
Grammar analysis does not call an LLM. It runs on a dependency grammar engine and returns results immediately. During launch, the add-in and web version are both free for a limited time.
need realRead long and difficult sentencessituations that require genuinely understanding long sentences, not simply handing them to a translator.
Break down each multi-clause sentence in past-paper reading, identify the main clause before answering, and avoid guessing by feel.
When a key sentence is long and convoluted, label its components first to identify the subject, predicate, object and modifiers quickly.
When the teacher explains the sentence structure, he uses color-layered component diagrams to directly project onto the screen, eliminating the need to write on the blackboard.
When you encounter a long sentence that you don't understand when reading English emails or documents, you can analyze the sentence and chew down the grammar in fragments. You don't have to devote time to learning.
No installation · Web tools
No Windows, or don’t want to install the add-in? Open the web tool in your browser, switch to Grammar Analysis and paste an English sentence. Mac, iPad and mobile are supported too.
Web version component overview
Three-level detail · Click to enlarge
Open the online tools and sign in to your TopCopilot account with WeChat or SMS.
Switch to the "Grammar Analysis" tab at the top of the workbench and paste or enter an English sentence (no more than 600 characters at a time).
Click Start Analysis to see color-coded sentence components, clause types and a summary of sentence pattern, tense and voice.
Structured, reproducible, and readable: every outputSentence component annotationThe format is consistent and suitable for repeated comparison and study.
| Comparison | Asking an AI chatbot about grammar | Browser extension | Word add-in | Web version |
|---|---|---|---|---|
| Output format | a natural language explanation | Structured component labels + three-level diagram | Structured component labels + three-level diagram | Structured component labels + three-level diagram |
| Sentence component color layering | None | Yes | Yes | Yes |
| Clause types / tense and voice summary | Not necessarily all | fixed output | fixed output | fixed output |
| Usage scenarios | Copy and switch back and forth | Select text on a web page to analyze | Select text in a Word document to analyze | Browser paste or type |
| cost | Depends on the product | Free for a limited time | Free for a limited time | Free for a limited time |
The extension and web version use the same analysis engine as the Word add-in. Use the extension for web pages and the add-in for Word documents.
Grammar analysis, translation and spreadsheet tools share one web workbench. No installation is required, and Mac/mobile are supported.
Upload .docx and download the AI translation, preserving the original layout where possible.
Learn more →Upload .xlsx to translate cell by cell while preserving formulas and workbook structure.
Learn more →Translate screenshots and photos: upload or paste an image with text, then generate and download a translated image.
Learn more →Turn screenshots and scans into editable .docx files while preserving the original formatting and illustrations where possible.
Learn more →Turn table screenshots, pasted images and photos into editable .xlsx files.
Learn more →Turn bank statements, quotes and scans into editable .xlsx files.
Learn more →Powered by Tencent Hunyuan Hy-MT2-Pro. Upload a PDF with a text layer and download bilingual and translation-only PDFs, preserving the original layout where possible.
Learn more →Reading an English web page? Install the extension and select a sentence to analyze it automatically. In Word, use the add-in, or try the web version without installing anything.
View pricing and credits Grammar analysis is now available free for a limited time
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