Grammarly作为一款英语语法校对和纠正系统，可以在Windows，Mac, iOS和安卓等多个平台使用，具有检查单词拼写，修正语法错误，纠正标点符号，检测无效的词汇和过渡使用的单词，调整语气和给出写作风格建议等多种功能，同时还可以有论文查重功能。下面我们来详细看看这些功能。
1. 单词拼写(Spelling): Grammarly 可以在线修复棘手的拼写错误，比如：
Incorrect: The weather may effect our plans.
Correct: The weather may affect our plans.
2. 英语语法(Grammar): Grammarly可以帮助消除语法错误，比如：
Incorrect: Please email Mike or myself if you have questions.
Correct: Please email Mike or me if you have questions.
3. 标点符号(Punctuation), Grammarly 可以纠正错误的标点符号，比如：
Incorrect: I like to travel in the winter not the summer.
Correct: I like to travel in the winter, not the summer.
4. 无效的词汇(Ineffective vocabulary), Grammarly可以替换平淡无奇的词汇，比如：
Okay: I'm very happy to be part of the team.
Great: I'm thrilled to be part of the team.
5. 过渡使用的词汇(Overused words), Grammarly可以纠正文中频繁出现的单词，并给出替换词汇，比如：
Okay: An algorithm change can be an opportunity for your company to explore a change of strategy.
Better: An algorithm change can be an opportunity for your company to explore a shift in strategy.
6. 过于模糊的语言（Hedging language）,Grammarly 可以纠正模糊的单词，使句子意思更明确，比如：
Hedging: I think we should be able to solve this issue for you.
Confident: We can solve this issue for you.
7. 过渡使用被动语气(Passive voice overuse), 对于过多使用被动语气，Grammarly也会去纠正，比如：
Passive: The late fees should be paid by Jesse.
Active: Jesse should pay the late fees.
8. 非包容性语言(Non-inclusive language), 纠正非当前的词汇，比如：
Inappropriate: The venue is accessible for guests who are confined to wheelchairs.
Better: The venue is accessible for guests who use wheelchairs.
9. 不礼貌的语言(Impoliteness),对于一些使用苛刻或者有伤害的词汇，Grammarly会给出一些建议，比如：
Harsh: I hated the proposal.
Polite: I wouldn’t say I liked the proposal.
10. 不恰当的文体风格纠正(Inappropriate formality level), Grammarly会建议即使在你着急的情况下，也应该保持风采和专业，比如：
Too casual: Is there anything else I can do for u???
Better: Is there anything else I can do for you?
另外，Grammarly还会根据你的文章的风格，给出相应的建议，如下图：
Grammarly还有论文查重功能，其比对库包含超过160亿个网页内容。但实际使用后，其查重功能跟专业的英文查重系统turnitin相比还是差距甚远，不建议使用grammarly的查重功能。
