This question tests plural noun formation (CCSS.L.3.1.b). The noun dog is a regular plural. For most nouns, the rule is to just add -s. The singular is dog so the plural is dogs. We use this rule because it doesn't end in a hissing sound or y, so the simple -s applies. Choice C is correct because it correctly adds -s following the rule for regular nouns. Choice B represents a common error where students mistakenly add -es, overapplying the hissing sound rule. This happens because students learn -es for some words and confuse when to use it. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: most common - just add -s. Watch for: overgeneralization of -s / forgetting -es.

This question tests plural noun formation (CCSS.L.3.1.b). The noun goose is an irregular plural. For this irregular vowel change pattern, the rule is to change oo to ee, from goose to geese. The singular is goose so the plural is geese. We use this rule because it follows an Old English irregular pattern with vowel change. Choice A is correct because it correctly changes goose to geese following the irregular vowel change rule. Choice B represents a common error where students apply the regular -s rule to an irregular noun. This happens because the pattern is not yet automatic. To help students: For irregular practice word families (man-men woman-women / tooth-teeth foot-feet). Memory aid: one goose many geese - not gooses. Watch for: irregular nouns getting -s.

This question tests plural noun formation (CCSS.L.3.1.b). The noun dish is a regular plural. For nouns ending in sh, the rule is to add -es. The singular is dish so the plural is dishes. We use this rule because it ends in a hissing sound like sh, adding a syllable for pronunciation. Choice B is correct because it correctly adds -es following the rule for regular plurals ending in sh. Choice A represents a common error where students overgeneralize the -s rule without the e. This happens because students learn the -s rule first and apply it everywhere. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: if you can hiss the ending sound add -es. Watch for: overgeneralization of -s or forgetting -es.

This question tests plural noun formation (CCSS.L.3.1.b). The noun brush is a regular plural. For nouns ending in sh, the rule is to add -es. The singular is brush so the plural is brushes. We use this rule because it ends in a hissing sound like sh, adding a syllable for pronunciation. Choice B is correct because it correctly adds -es following the rule for regular plurals ending in sh. Choice A represents a common error where students overgeneralize the -s rule without the e. This happens because students learn the -s rule first and apply it everywhere. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: if you can hiss the ending sound add -es. Watch for: overgeneralization of -s or forgetting -es.

This question tests plural noun formation (CCSS.L.3.1.b). The noun child is an irregular plural. For irregular complete change, the rule is the word transforms entirely. The singular is child so the plural is children. We use this rule because it follows an old English pattern that doesn't add endings but changes the word. Choice B is correct because it correctly changes child to children following the rule for this irregular noun. Choice A represents a common error where students apply regular rule to irregular by adding -s. This happens because students learn -s rule first and apply it everywhere. To help students: For irregular practice word families (man-men woman-women / tooth-teeth foot-feet). Memory aid: one child many children - not childs. Watch for: irregular nouns getting -s.

This question tests plural noun formation (CCSS.L.3.1.b). The noun box is a regular plural. For nouns ending in x, the rule is to add -es. The singular is box so the plural is boxes. We use this rule because it ends in a hissing sound like x, which requires -es to make pronunciation easier. Choice B is correct because it correctly adds -es following the rule for regular plurals ending in x. Choice A represents a common error where students overgeneralize the -s rule without adding the e. This happens because students learn the -s rule first and apply it everywhere. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: if you can hiss the ending sound add -es. Watch for: overgeneralization of -s or forgetting -es.

This question tests plural noun formation (CCSS.L.3.1.b). The noun baby is a regular plural. For the y rule, the rule is consonant+y changes to -ies. The singular is baby so the plural is babies. We use this rule because it has a consonant before y, requiring the change for proper spelling. Choice B is correct because it correctly changes y to -ies following the rule for nouns ending in consonant-y. Choice A represents a common error where students don't change y to i and just add -s. This happens because the pattern is not yet automatic. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: consonant-y becomes -ies like baby to babies, but vowel-y just adds -s like boy to boys. Watch for: forgetting to change y to i.

This question tests plural noun formation (CCSS.L.3.1.b). The noun goose is an irregular plural. For irregular vowel change, the rule is to change the vowel sound inside the word. The singular is goose so the plural is geese. We use this rule because it follows an old English pattern for certain birds. Choice B is correct because it correctly changes goose to geese following the rule for this irregular vowel change. Choice A represents a common error where students apply regular rule to irregular by adding -s. This happens because students learn -s rule first and apply it everywhere. To help students: For irregular practice word families (man-men woman-women / tooth-teeth foot-feet). Memory aid: one goose many geese - not gooses. Watch for: irregular nouns getting -s.

This question tests plural noun formation (CCSS.L.3.1.b). The noun watch is a regular plural. For nouns ending in ch, the rule is to add -es. The singular is watch so the plural is watches. We use this rule because it ends in a hissing sound like ch, adding a syllable. Choice B is correct because it correctly adds -es following the rule for regular plurals ending in ch. Choice A represents a common error where students overgeneralize the -s rule without the e. This happens because students learn the -s rule first and apply it everywhere. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: if you can hiss the ending sound add -es. Watch for: overgeneralization of -s or forgetting -es.

This question tests plural noun formation (CCSS.L.3.1.b). The noun city is a regular plural. For the y rule, the rule is consonant+y changes to -ies. The singular is city so the plural is cities. We use this rule because it has a consonant before y, requiring the change for spelling. Choice B is correct because it correctly changes y to -ies following the rule for nouns ending in consonant-y. Choice A represents a common error where students don't change y to i and just add -s. This happens because the pattern is not yet automatic. To help students: For regular plurals teach the three main patterns (most add -s / -es after sibilants / y-to-ies after consonant). Memory aid: consonant-y becomes -ies like city to cities, but vowel-y just adds -s like key to keys. Watch for: forgetting to change y to i.