Past tense of 'run'.

**The reasoning** In English, verbs change form to show when an action happened. "Run" is an **irregular verb** — it doesn't follow the normal "-ed" rule for past tense. Instead, it has its own special past form: **ran**. - Present: I **run** every day. - Past: Yesterday, I **ran** five kilometres. The principle here is recognizing **irregular verbs**. These are common English verbs you must memorize because they don't follow standard patterns (like walk → walked). **Why the wrong options tempt you** - **A) runned** — This looks right if you're applying the regular past tense rule (add "-ed"). But "run" is irregular, so this form doesn't exist. - **B) running** — This is the *present continuous* form (I am running), not past tense. - **D) run** — This is still present tense. Some verbs stay the same (like "cut" → "cut"), but "run" isn't one of them. **Quick takeaway** Irregular verbs don't play by "-ed" rules — **run becomes ran** in the past, just like swim → swam, drink → drank. Memorize these outliers!