A noun is countable if you use numbers to describe, or count, how many there are - one pencil, two notebooks, three chairs.  If there is more than one, that noun takes an s to form the plural: notebook + s, chair + s.  A noun is uncountable if you use an amount to decribe, or measure, how much there is - a bowl of soup, a lot of dust. Uncountable nouns usually only have a singular form. Some nouns only have a plural form because they have two parts - jeans, scissors, tongs, pliers. The indefinite articles a or an are used only with singular countable nouns - I have an orange. Some nouns are both countable and uncountable. I found three hairs in my salad. That dog has a lot of hair. We need six pizzas for the entire class. Let's get some pizza. How many lights are in the house? The windows do not let in much light. Would you like an iced coffee? May I have two coffees to go, please? The harvest produced a ton of coffee. The different forms can have different meanin...

  500 Verbs Simple Present Tense The simple present tense is used to describe facts and habits.  I applaud the singer.  (fact)   Aplaudo a la cantante. You study English every week.  ( fact and habit)  Estudias íngles todas las semanas . She walks her dog three times a day.  (fact and habit)   Ella pasea a su perra tres veces al dia. It is also used to describe events in the future.  She arrives tomorrow.  Ella llega mañana. Infinitive verbs in English begin with to.  For example, aprender is to learn . The simple present tense conjugation for first and second person drops the to: aprendo  -  I learn; aprendes - you learn; third person adds an -s: aprende - s/he learns.   First person singular               I learn Second person singular          You learn Third person singular              She/he/it learns ...