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Using a or an
- Using a or an
Contenido Principal
- Grammar 526
- Verbs 139
- Adjectives 139
- Nouns 117
- Sentences 99
- Tenses 77
- Present Simple 73
- Pronouns 71
- Past simple 58
- English 56
- Action verbs 56
- Irregular verbs 54
- Verb to be 51
- Verb Tenses 50
- Prepositions 49
- Present Continuous 47
- Grammar exercises 45
- Subject and Verb Agreement 42
- Plural nouns 42
- Simple Present 40
- Types of sentences 39
- Vocabulary 35
- Present Perfect 32
- Past tense 30
- Articles 29
- Adverbs 28
- Common and Proper Nouns 27
- Punctuation 22
- Possessive Nouns 22
- Conjunctions 21
- Thinkie 21
- Conditionals 18
- Subject and predicate 18
- Present simple 18
- Personal Pronouns 17
- Plurals 15
- Passive voice 15
- Parts of speech 15
- Prepositions of place 14
- Possessive adjectives 14
- Commas 14
- Spelling 14
- Types of Sentences 14
- English Grammar 12
- Writing 12
- Proper Nouns 12
- Contractions 12
- Plural Nouns 12
- Used to 11
- Modals 11
- Past Simple Tense 10
- Review 10
- Comparative and superlative 10
- Quantifiers 10
- Possessive pronouns 10
- Present Simple and Present Continuous 9
- Future 9
- Past continuous 9
- There is there are 8
- Ela 8
- Test 8
- Singular and Plural 8
- Simple past 8
- Sentences and Fragments 8
- Word Order 8
- Simple present 8
- Subject Pronouns 8
- Collocations 7
- Was were 7
- Reflexive pronouns 7
- Wh questions 7
- Past progressive 7
- Past tense verbs 7
- I am 7
- 不定詞 7
- Homophones 7
- Reported speech 7
- Verb tenses 7
- Parts of Speech 7
- Present perfect 7
- Articles a and an 7
- Adverbs of frequency 6
- Preposition 6
- Comparative 6
- Will 6
- Revision 6
- Reading 6
- Relative pronouns 6
- Singular and Plural Nouns 6
- Helping verbs 6
- Present continuous 6
- Irregular Verbs 6
- Reported Speech 6
- Present Continuous Tense 6
- Gerund and Infinitive 5
- Wh- questions 5
- English as a second language 5
- Can-can't 5
- Gender nouns 5
- Verbs to be 5
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