# Grammar

**[When to use “tú” and “usted” in Spanish](https://blog.duolingo.com/tu-vs-usted/)**  
Jul 9  
[Olivia Thayer, M.A.](https://blog.duolingo.com/author/olivia/)

**[How to use infinitives in English (and over 130 examples!)](https://blog.duolingo.com/infinitive-bare-form-english/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)

**[How to conjugate English verbs in the simple present](https://blog.duolingo.com/simple-present/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)

**[100+ regular and irregular verbs in English](https://blog.duolingo.com/list-of-verbs/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)

**[2 ways to form the future tense in English](https://blog.duolingo.com/future-will-going-to/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)

**[How to use the present progressive in English](https://blog.duolingo.com/progressive-verbs/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)

**[Types of English verbs: modals, auxiliaries, and more](https://blog.duolingo.com/types-of-verbs/)**  
Jul 8  
[Cindy Blanco, Ph.D.](https://blog.duolingo.com/author/cindy/)

**[The complete guide to English verbs](https://blog.duolingo.com/verb-forms/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)

**[Past participles in English: how to form them and when to use them](https://blog.duolingo.com/uses-of-participles/)**  
Jul 8  
[Lindsey Lange-Abramowitz, M.A.](https://blog.duolingo.com/author/lindsey/)