| Grammar Concept | Description | Example |
|---|
| Tenses | Show when actions happen (present, past, future, perfect, continuous). | Ex: I have eaten burgers for five years (present perfect, duration). Why: Uses past participle “eaten” as the main verb, like your “I have kept fit.” |
| Prepositions | Indicate place, time, direction (in, on, at, for). | Ex: I’m in Bangkok for a week. Why: Shows location (in) and duration (for), as in your Bangkok questions. |
| Subject-Verb Agreement | Verbs match subject in number/person. | Ex: She eats burgers; they eat burgers. Why: Singular adds -s to “eat” in present simple. |
| Articles | Clarify noun specificity (a, an, the, zero). | Ex: I ate a burger; burgers are tasty. Why: “a” for singular, no article for general, as you asked about “a burger” vs. “burgers”. |
| Parts of Speech | Roles like nouns, verbs, adjectives, adverbs. | Ex: I always (adverb) eat (verb) tasty (adjective) burgers (noun). Why: Builds clear sentences, like your tense examples. |
| Sentence Structure | Simple, compound, complex sentences. | Ex: I eat burgers, but I play basketball. Why: Compound joins clauses with “but”. |
| Modal Verbs | Express ability, possibility, obligation (can, will). | Ex: I can play basketball; I will be in Bangkok. Why: Followed by base verb, as in your “Will you be in Bangkok?” |
| Pronouns | Replace nouns (subject, object, possessive). | Ex: I love them (burgers). Why: “I” (subject), “them” (object) for flow. |
| Conditionals | Hypothetical situations (if clauses). | Ex: If I go to Bangkok, I will eat burgers. Why: First conditional for likely future, mixing tenses. |
| Active vs. Passive Voice | Active (subject acts); passive (action focus). | Ex: I ate a burger (active); the burger was eaten (passive). Why: Passive uses “be” + past participle “eaten”. |
