Grammar Patterns

Master the differences between can/could, will/would, and may/might - when to use each for requests, ability, possibility, and politeness

The Rule since + point in time (specific moment) for + period of time (duration) Scenarios ⏰ Describing Duration Context since (point) for (period) Work since January for three months Study since 2020 for five years Living since I graduated for a decade 💬 Example Sentences With since: “I’ve been working here since 2021.” (从 2021 这个时间点开始) “She’s been studying English since last Monday.” “They’ve been collaborating since the project started.” With for: ...

When to Use Actions that started in the past and continue to the present Emphasizing the duration or ongoing nature of an activity Pattern 1 Subject + have/has + been + verb-ing Scenarios 💼 Business Communication “I have been working on this project for two weeks.” “We have been collaborating with the security team since January.” “The team has been developing the new feature for months.” 📚 Learning & Development “She has been studying English since 2020.” “They have been learning about cloud security for a year.” “I have been researching post-quantum cryptography recently.” 🏠 Lifestyle & Habits “They have been living in Shenzhen for 5 years.” “He has been practicing meditation for six months.” Key Points Time Expressions Expression Usage Examples for + period Duration for two weeks, for a month, for years since + point Starting point since Monday, since 2020, since last week Common Mistakes ❌ Avoid ✅ Use Instead I am working since two weeks I have been working for two weeks She is studying since 2020 She has been studying since 2020 Memory Trick for = 持续了一段时间（duration） since = 从某个时间点开始（starting point） Practice Complete the sentences with present perfect continuous: ...

The Rule it’s = it is (contraction, 缩写) its = possession (物主代词，“它的”) Examples ✅ Correct Usage “It’s a sunny day.” (It is a sunny day) “The company increased its revenue.” (公司的收入) “It’s been a long week.” (It has been…) “The dog wagged its tail.” (狗摇了摇它的尾巴) ❌ Common Mistakes ❌ Wrong ✅ Correct Note Its a sunny day It’s a sunny day Need contraction The company increased it’s revenue The company increased its revenue Need possession Memory Trick Quick test: Can you replace it with “it is”? ...

The Rule Many words that look like single words are actually two separate words. These are called compound words or fixed phrases. Common Mistakes ❌ Wrong ✅ Correct Note ofcourse of course 两个词 lastday last day 两个词 everyday every day 注意：everyday 是形容词，every day 是副词 alot a lot 两个词 nevermind never mind 两个词 eachother each other 两个词 Detailed Examples Of Course Correct: “of course” (两个词) ...