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English Explanations

1. Use the simple present tense to talk about things that you do regularly, things that usually happen, and things that are always true.
2. When the subject is "he," "she," "it," or a singular noun, add "-es" to verbs ending with "-ch," "-s," "-sh," "-x," or "-z." For verbs ending with a vowel + "y," just add "-s." For verbs ending with a consonant + "y," change the "y" to "i" and add "-es."
3. Some verbs have irregular forms. "Be" is irregular with all subjects. All present tense forms of "be" can be shortened."Have," "do," and "go" are irregular when the subject is "he," "she," "it," or a singular noun.
The form for negative statements with "be" is the present tense of "be" plus "not." You can shorten "not" to "n't," except after "am." For all other verbs the form for negative statements is S + "do/does not" + base form of the verb. You can shorten "do not" to "don't" and "does not" to "doesn't."
4. Use certain adverbs with the simple present tense to show how often something happens. Adverbs of frequency come before the verb, unless the verb is "be." If the verb is "be," the adverb comes after the verb.

Grammar
THE SIMPLE PRESENT TENSE

Positive Statements

I

+

V (base form)

He/She/It

+

V (base form) + s

You/We/They

+

V (base form)

Irregular Verbs

Be

Have

Do

Go

I

am 'm

have

do

go

He/She/It

is 's

has

does

goes

You/We/They

are 're

have

do

go

Negative Statements

I

am not

He/She/It

isn't

You/We/They

aren't

I

don't

+

V (base form)

He/She/It

doesn't

+

V (base form)

You/We/They

don't

+

V (base form)

Adverbs of Frequency

always

usually

often

sometimes

seldom

rarely

never

S +

adverb

+

V

S +

be

+

adverb