Secret of English Sentence Formation

V1

V2

V3

V4

V5

V3

V4

I eat
You eat
They eat
He eats
She eats
Tom eats

I ate
You ate
They ate
He ate
She ate
Tom ate

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They have
He has

had
had

eaten
eaten

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They are
He is
I am

were
was
was

eating
eating
eating

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They have
He has

had
had

been
been

eating
eating

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I will
I shall
I can
I may
I must
I need to
I ought to

would
should
could
might
had to
needed to

(to)eat
(to)eat
(to)eat
(to)eat
(to)eat
(to)eat
(to)eat

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I will
I shall
I can
I may
I must
I need to
I ought to

would
should
could
might
had to
needed to

(to)have
(to)have
(to)have
(to)have
(to)have
(to)have
(to)have

eaten
eaten
eaten
eaten
eaten
eaten
eaten

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I will
I shall
I can
I may
I must
I need to
I ought to

would
should
could
might
had to
needed to

(to)have
(to)have
(to)have
(to)have
(to)have
(to)have
(to)have

been
been
been
been
been
been
been

eating
eating
eating
eating
eating
eating
eating

 
I don’t         I didn’t       (to)eat
You don’t       You didn’t     (to)eat
They don’t      They didn’t    (to)eat
He doesn’t      He didn’t      (to)eat
She doesn’t     She didn’t     (to)eat
Tom doesn’t     Tom didn’t     (to)eat

V1 and V2 are finite verbs and they are used just after the Subject in statements. The other verb forms V3, V4, and V5 can’t be used after the subject. They need an auxiliary verb (V1 orV2) after the subject in making statements. The above chart shows you how English sentences are constructed.
 

    Tenses                              Patterns
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Future Simple Tense                 S + will + V5
Future Progressive Tense            S + will + be + V4
Future Perfect progressive Tense    S + will + have + been + V4
Future Perfect Tense                S + will + have + V3 
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Present Simple Tense                S + V1
Present Progressive Tense           S + is / am / are + V4
Present Perfect progressive Tense   S + has / have + been + V4
Present Perfect Tense               S + has / have + V3
_______________________________________________________________

Past Simple Tense                   S + V2
Past Progressive Tense              S + was / were +V4
Past Perfect progressive Tense      S + had + been +V4
Past Perfect Tense                  S + had + V3

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Conditional Simple Tense      S + would + V5
Conditional Perfect Tense     S + would + have + V3

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Future with ‘going to’        S + is / am / are + going to + V5
Past with ‘going to’          S + was / were + going to + V5