We usually do not add - s to the third person singular in the affirmative.

We use the Present Simple with expressions of frequency.

We add an -s to the main verb when it appears with does/doesn't.

We use do and does to make negatives, questions and short answers.

We put adverbs of frequency (never, ofetn, usually) after the main verb.

We don't use the Present Simple to talk about repeated actions.

We use the Present Simple to talk about facts.

When we give instructions or directions, we do not use the Present Simple.

Most verbs tak -s in the third person singular.

In the Present Simple verbs ending in a vowel +y, simply take -s.

In the Present Simple verbs ending in -sh, take - s.

In the Present Simple, expressions such as every day, once a week go at the beginning of the sentence and in the middle of the sentence.

The adverbs never, seldom and rarely have a negative meaning and are never used with the word not.

In short answers adverbs of frequency go before the auxiliary verbs.

We form the Present Continuous with the auxiliary verb to be and the main verb with the -ing suffix.

The main verb with the -ing suffix is different in all persons.

We use the Present Continuous for temporary actions.

Verbs ending with -ie, drop the -ie and take -y

+-ing.

Verbs ending in -e, do not drop the -e and take the -ing suffix.

The Present Continuous is used with the following expressions: usually, often, never, seldom.

We use the Present Continuous with adverbs such as: always, contantly, continually, etc.

State verbs are verbs which describe an action rather than a state and normally have continuous tenses.

Some of the state verbs are used in continuous tenses when they describe actions and not states.