Present simple tense

We use the present simple tense to talk about facts which are always true, and to talk about daily routines and habits. For example;

I get up in the morning at 7 o'clock, and I go to work at 8.15. We have a break around 10 o'clock and the lesson finishes at 11.30. I teach an elective class until 1 o'clock. In the afternoon, I plan the next lesson and mark homework, but on Wednesdays, I go to university. 

We make the present simple tense by using the base form of the verb. For example,
  get   have   finish   teach   plan   mark   go

If we want to talk about he/she/it (sometimes called the third person singular), we need to add -s/-es/-ies

For most verbs, add s      get---> gets,    plan ---->

But if the base form ends with ch/sh/s/z/x/o, we need to add es      finish ----> finishes,   go---> goes,    do ---> does

It's very important to remember do ---> does because we need this word to make negative sentences and questions.

If the base form ends with a consonant + y, change the y to ies    study ----> studies,    carry ----> carries     play ----> plays (because play ends with a vowel + y)

The verb have is irregular: I have, you have, he has

Negative sentences

To make negative sentences, we use don't/doesn't + base form. (We say do is an auxiliary verb which helps us to make negative sentences.)

     I play ---> I don't play     I teach ----> I don't teach

Be careful with the third person. Remember, you use doesn't + BASE FORM. This is very important with have

     the lesson finishes ----> the lesson doesn't finish,     he goes -----> he doesn't go,    
        she has breakfast -----> she doesn't have breakfast

Questions

To make questions, we change the word order. Instead of you don't, we say do you. We change the order of the subject (you) and the auxiliary verb (do). We use do/does + base form to make questions. Be careful with have

Positive: you play football     Negative: you don't play football     Question: do you play football?
Positive: she watches TV       Negative: she doesn't watch TV        Question: does she watch TV?
Positive: he has breakfast      Negative: he doesn't have breakfast  Question: does he have breakfast?

Remember to use a question mark (?) at the end of a question.
To make questions, we change the word order.

Here are some links where you can practise:
1. https://elt.oup.com/student/englishfile/elementary/a_grammar/file02/?cc=gb&selLanguage=en
2. https://elt.oup.com/student/result/engelem/a_grammar/unit03/?cc=gb&selLanguage=en
3. https://elt.oup.com/student/headway/elementary4/grammar/unit02/?cc=gb&selLanguage=en
4. https://elt.oup.com/student/headway/elementary4/grammar/unit03/?cc=gb&selLanguage=en