Summary of English Grammar, Vocabulary, and Usage

## Introduction The goal of this material is to review key aspects of the **present perfect** and the **past simple**, the use of **for / since**, and conclude with practice on **adjectival suffixes** (-able, -ful, -ic, -ive, -y). You will find clear explanations, comparative tables, practical examples, and exercises to practice. > Definition: The **present perfect** connects the past with the present; it is formed with "have/has + participle" and is used for unfinished actions or experiences where the time is not specified. > Definition: The **past simple** expresses actions that occurred and finished at a specific time in the past. ## 1. Present Perfect vs. Simple Past ### Basic Formation - Present Perfect: **have/has + past participle** (e.g., I have lived, She has sold) - Simple Past: **verb in past tense** (e.g., I lived, She sold) ### Main Usage - Present Perfect: actions that started in the past and continue into the present, or past actions without a specified time. Examples: - "I've been a minimalist for three years." (still a minimalist) - "I've never been to Spain." (untimed experience) - Simple Past: actions completed at a specific point in time. Examples: - "I sold my skates last year." (completed action) - "I met Jane two days ago." (specific moment) > Definition: We use **for** for periods of time (for three years) and **since** for specific points in time (since 2018 / since I was 12). ### Comparison Table | Present Perfect | Simple Past | | --- | --- | | Unfinished or untimed actions: "I've lived here for five years." | Actions completed at a specific time: "I lived there in 2019." | | Common uses: for, since, ever, never, already, yet | Common uses: yesterday, last year, in 2010, ago | ### Examples and Transformations - I have had this watch since I was six. (present perfect + since) - He sold a lot of his clothes three years ago. (simple past + ago) - We've been to California twice. (present perfect for experiences) - My parents took this photo last year. (simple past for a completed action) Did you know that with the present perfect, we can ask about experiences, and then use the simple past to ask for details? For example: "Have you ever eaten sushi?" — "Where did you eat it?" ## 2. Time expressions: for / since and others - for: indicates duration (for two years, for a long time) - since: indicates the starting point (since 2018, since Monday, since I was 13) - Words often used with the simple past: yesterday, last week, in 2010, three years ago, ago Table of examples | Present Perfect | Simple Past | | --- | --- | | for a long time, since 2018, since I was 12, all my life, for two years | in 2023, last year, yesterday, three years ago, one year ago | Example exercises (answers): - "He's sold/sold a lot of his clothes three years ago." → **sold** (simple past) - "I've had/have this watch since I was six." → **I've had** - "We've been/went to California twice." → **We've been** (experience, present perfect) - "My parents have taken/took this photo last year." → **took** (simple past: specific moment) ## 3. How long + present perfect (for and since) - Example question: "How long have you had your phone?" Answer: "I've had it for six months." or "I've had it since January." - Use **How long** with the present perfect to ask about the duration of an ongoing action. Examples: - How long have you been collecting butterflies? — For three years. - How long have you lived in this town? — I've lived here for five years. Practice Table | Question | Answer with 'for' | Answer with 'since' | | --- | --- | --- | | How long have you had those trainers? | I've had them for about a year. | — | | How long have you had your phone? | I've had it for six months. | I've had it since January. | Fun fact: Did you know that in English, the use of "have been" can indicate both experience and duration/permanence, depending on the accompanying verb and the temporal context? ## 4. Adjectival Suffixes (-able, -