The document discusses the simple present tense in English. It is used to describe general actions, events, and states that happen regularly or are always true. The simple present takes different forms depending on whether it is affirmative, negative, or interrogative. For affirmative sentences, the verb takes the base form or adds -s depending on the subject. Negative sentences use "don't" or "doesn't" plus the verb infinitive. Interrogative sentences begin with "do" or "does" plus the subject and verb infinitive.

1. Tenses (I) – Simple
present

2. Use
 General actions, events and states.
E.g:
- I have lunch with Peter every Saturday.
- Ice melts at 0º.
- I believe in you.
 Negative and interrogative sentences  auxiliary “do” (do/does)
 Signal words:
• always
• every (...)
• often
• normally
• usually
• sometimes
• never
• first
• then
• (...)

3. Use
 be
 have got

4. Affirmative form
I travel  Verbs ending in ch / s /
you travel sh / z / x  add –es.
he/she/it travels E.g: watch – watches / kiss
we travel – kisses / wish – wishes
you travel
 Verbs ending in
they travel
“consonant + y” 
remove –y and add –ies.
E.g: worry – worries
 For can, might, may, must
don’t add –s.

5. Negative form
 don’t / doesn’t. (subject + don’t / doesn’t + verb infinitive + ...)
E.g:
- I don’t travel very often.
- He doesn’t travel very often (he/she/it  doesn’t)

6. Interrogative form
 Do / Does. (Aux. do or does + subject + verb infinitive + ...)
E.g:
- Do they travel alone?
- Yes, they do. / No, they don’t.
- Does she travel alone?  (he/she/it  Does)
- Yes, she does. / No, she doesn’t.