Beginner Level Advanced Level
Duolingo Topics
Content
Basic 1 | Alphabet Introduction 1 | Possession | Demonstrative Determiners | Plurals | Alphabet Introduction 2 | Basics 2 | Negation | Common Phrases | Classifiers 1 | Animals 1 | Clothing | Food | Questions 1 | Verbs 1 | Objects | Questions 2 | Colors | Adjectives 1 | Conjunctions | Numbers | Continuous | Ordinal numbers | Verbs 2 | Dates and Time | Family | Comparison | Prepositions 1 | Geography | Common Phrases 2 | Countries 1 | Nominalization | Jobs 1 | Future | Attributes | Verbs 2.5 | Adjectives 1.5 | Frequency | Objects 2 | Conjunctions 2 | Adverbs | Modal Verbs | Places | Ask and tell the time | Countries 2 | Past | Travel | Verbs 3 | Passive | Prepositions 2 | Education | Common Phrases 3 | Common Phrases 4 | Common Phrases 5 | Reflexive | Determiners | Relative Clauses | People | Abstract Objects 1 | Verbs 4 | Animals 2 | Communication | Nature | Adjectives 2 | Miscellaneous | Politics | Sports | Arts | Abstract Objects 2 | Classifiers 2 | Jobs 2 | Medical | Science | Economics | Astronomy | Adjectives 3 | Verbs 5 | Vietnam | History | Abstract Objects 3 | Military | Paranormality | Classifier 3.1 | Reduplicative Words | Informal Expressions | Reduplicative Words 2
[ C ]  to introduce + [ D ] sign + [ D ] brand + [ D ] signal light +
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