# A1-A2 grammar

- [Adjectives and prepositions](/english/a1-a2-grammar/adjectives-and-prepositions.md): （初级）（中级前）清晰简单的语法
- [Adjectives ending in '-ed' and '-ing'](/english/a1-a2-grammar/adjectives-ending-in-ed-and-ing.md): Do you know the difference between bored and boring? Test what you know with interactive exercises and read the explanation to help you.
- [Articles: 'a', 'an', 'the'](/english/a1-a2-grammar/articles-a-an-the.md): Do you know how to use a, an and the? Test what you know with interactive exercises and read the explanation to help you.
- [Articles: 'the' or no article](/english/a1-a2-grammar/articles-the-or-no-article.md): Do you know when you need to use the in common phrases and place names? Test what you know with interactive exercises and read the explanation to help you.
- [Comparative adjectives](/english/a1-a2-grammar/comparative-adjectives.md): Do you know how to use comparative adjectives like older, better and more interesting? Test what you know with interactive exercises and read the explanation to help you.
- [Infinitive of purpose](/english/a1-a2-grammar/infinitive-of-purpose.md): Do you know how and when to use an infinitive to talk about purpose? Test what you know with interactive exercises and read the explanation to help you.
