PRESENT PERFECT TENSE

Definition :

A complete action which has on effect or result in the present

Pattern :

+ S+ Have/Has + VIII + O

S + Have/Has + Not + VIII + O

? Have/Has + S + VIII + O

Has à Subject : He, She, It

Have à Subject : I, We, You, They

Time Signal :

For …(for three month, for two years, for an hour etc)‏

Since …( since January, since yesterday, since 1991 etc)‏

Just …for a very recent action (a few second / minutes ago)‏

Already in positive sentences

Yet in negative and interrogative sentences

Examples :

+ I have already eaten

- He has not brought my book yet

? Have you read this book?