{"id":2170,"date":"2026-06-11T01:07:39","date_gmt":"2026-06-11T01:07:39","guid":{"rendered":"https:\/\/allenglish4u.com\/toefl-step-1-book-3-unit-4-grammar\/"},"modified":"2026-06-11T01:07:39","modified_gmt":"2026-06-11T01:07:39","slug":"toefl-step-1-book-3-unit-4-grammar","status":"publish","type":"page","link":"https:\/\/allenglish4u.com\/vi\/toefl-step-1-book-3-unit-4-grammar\/","title":{"rendered":"TOEFL Primary Step 1 Book 3 Grammar &#8211; Unit 4 Superlatives"},"content":{"rendered":"<style>\n.ae4u-tx{--paper:#FAF6EE;--ink:#0F172A;--ink-soft:#475569;--accent:#0161FF;--ok:#0EA66B;--bad:#E11D48;--cyan:#06B6C4;--orange:#FF9D2E;--line:#E7E2D2;--card:#fff;font-family:'Plus Jakarta Sans',ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif !important;color:var(--ink);background:var(--paper);padding:24px 18px 60px;box-sizing:border-box;line-height:1.55;font-size:17px}\n.ae4u-tx *,.ae4u-tx *::before,.ae4u-tx *::after{box-sizing:border-box}\n.ae4u-tx 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&middot; Book 3 &middot; Unit 4<\/div>\n  <h1>Grammar &mdash; Unit 4: Superlatives<\/h1>\n  <p class=\"lead\">Quick lesson + exercises. Auto-graded; open questions show an example answer.<\/p>\n  <div class=\"tags\">\n    <span class=\"tag\">&#128221; Grammar<\/span>\n    <span class=\"tag\">&#9889; Auto-graded<\/span>\n    <span class=\"tag\">&#128202; Progress tracking<\/span>\n  <\/div>\n  <div class=\"progress-sticky\" id=\"globalProg\">\n    <span class=\"ptxt\">Progress <span class=\"pct\">0%<\/span> &middot; <span class=\"done\">0<\/span>\/<span class=\"total\">10<\/span><\/span>\n    <div class=\"pbar\"><i id=\"pbarFill\"><\/i><\/div>\n  <\/div>\n  <div class=\"section\">\n    <div class=\"section-head\">\n      <span class=\"sec-badge\">Lesson<\/span>\n      <h2>Superlatives<\/h2>\n    <\/div>\n    <div class=\"lesson-box\">When we compare three or more things or people, we use <strong>the superlative form<\/strong>. Pick the one most among them. Add <em>-est<\/em> or <em>most<\/em> to make superlatives.<br><br>Rules: add <em>-est<\/em> for one-syllable (long&#8594;the longest); double the consonant for ending in one vowel + consonant (big&#8594;the biggest); for those ending in y change to i and add -est (happy&#8594;the happiest); add <em>most<\/em> for two or more syllables (difficult&#8594;the most difficult); irregular: good&#8594;the best, bad&#8594;the worst.<\/div>\n  <\/div>\n  <div class=\"section\">\n    <div class=\"section-head\">\n      <span class=\"sec-badge\">B\u00e0i t\u1eadp<\/span>\n      <h2>Grammar Practice<\/h2>\n      <span class=\"sec-score\" id=\"score\">0\/10<\/span>\n    <\/div>\n    <div class=\"part-block\">\n  <div class=\"part-head\"><h3 class=\"part-title\">Part A<\/h3><span class=\"pbadge\" data-total=\"5\">0\/5<\/span><\/div>\n  <p class=\"part-instr\">Write the superlative form of each adjective.<\/p>\n  <div class=\"q-item\"><span class=\"num\">1.<\/span>high &#8594; <span class=\"ex\">highest<\/span><\/div><div class=\"q-item\"><span class=\"num\">2.<\/span>cold &#8594; <input type=\"text\" class=\"blank\" data-ans=\"coldest\" autocomplete=\"off\"><\/div><div class=\"q-item\"><span class=\"num\">3.<\/span>smart &#8594; <input type=\"text\" class=\"blank\" data-ans=\"smartest\" autocomplete=\"off\"><\/div><div class=\"q-item\"><span class=\"num\">4.<\/span>hot &#8594; <input type=\"text\" class=\"blank\" data-ans=\"hottest\" autocomplete=\"off\"><\/div><div class=\"q-item\"><span class=\"num\">5.<\/span>intelligent &#8594; <input type=\"text\" class=\"blank\" data-ans=\"most intelligent\" autocomplete=\"off\"><\/div><div class=\"q-item\"><span class=\"num\">6.<\/span>important &#8594; <input type=\"text\" class=\"blank\" data-ans=\"most important\" autocomplete=\"off\"><\/div>\n<\/div><div class=\"part-block\">\n  <div class=\"part-head\"><h3 class=\"part-title\">Part B<\/h3><span class=\"pbadge\" data-total=\"3\">0\/3<\/span><\/div>\n  <p class=\"part-instr\">Look at the charts. Then complete the answers.<\/p>\n  <table class=\"data-table\"><tbody><tr><th><\/th><th>Lucy<\/th><th>Maya<\/th><th>Julie<\/th><\/tr><tr><td>Age<\/td><td>13<\/td><td>14<\/td><td>15<\/td><\/tr><\/tbody><\/table><table class=\"data-table\"><tbody><tr><th><\/th><th>necklace<\/th><th>ring<\/th><th>bracelet<\/th><\/tr><tr><td>Price<\/td><td>$1,000<\/td><td>$10<\/td><td>$750<\/td><\/tr><\/tbody><\/table><div class=\"q-item\"><span class=\"num\">1.<\/span>Lucy is the <span class=\"ex\">youngest<\/span> person in the group. <em>(young)<\/em><\/div><div class=\"q-item\"><span class=\"num\">2.<\/span>Julie is the <input type=\"text\" class=\"blank\" data-ans=\"oldest\" autocomplete=\"off\"> person in the group. <em>(old)<\/em><\/div><div class=\"q-item\"><span class=\"num\">3.<\/span>The necklace is the <input type=\"text\" class=\"blank\" data-ans=\"most expensive\" autocomplete=\"off\"> piece of jewelry in the store. <em>(expensive)<\/em><\/div><div class=\"q-item\"><span class=\"num\">4.<\/span>The ring is the <input type=\"text\" class=\"blank\" data-ans=\"cheapest\" autocomplete=\"off\"> piece of jewelry in the store. <em>(cheap)<\/em><\/div>\n<\/div><div class=\"part-block\">\n  <div class=\"part-head\"><h3 class=\"part-title\">Part C<\/h3><span class=\"pbadge\" data-total=\"2\">0\/2<\/span><\/div>\n  <p class=\"part-instr\">Answer the following questions with your own answers. <em>(Open-ended &#8212; type any reasonable answer; Show Answer reveals an example.)<\/em><\/p>\n  <div class=\"q-item\"><span class=\"num\">1.<\/span>1. Who is the tallest person in your class? &#8594; <input type=\"text\" class=\"blank open\" data-ans=\"My friend Tom is the tallest in my class\" placeholder=\"(your own answer)\" autocomplete=\"off\" style=\"min-width:240px\"><\/div><div class=\"q-item\"><span class=\"num\">2.<\/span>2. 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Step 1 &middot; Book 3 &middot; Unit 4 Grammar &mdash; Unit 4: Superlatives Quick lesson + exercises. Auto-graded; open questions show an example answer. &#128221; Grammar &#9889; Auto-graded &#128202; Progress tracking Progress 0% &middot; 0\/10 Lesson Superlatives When we compare three or more things or people, we use the superlative form. 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