6. Perfect vs. Simple 1

- If you say

it happened (Yesterday, 1999, Last week) -> Use

. - If the time is

or UNFINISHED (In my life, So far) -> Use

.

- Past Simple: I saw the movie yesterday. (Finished time) - Present Perfect: I have seen the movie. (Experience - time doesn't matter) - Past Simple: Shakespeare wrote plays. (He is dead - finished period) - Present Perfect: JK Rowling has written books. (She is alive - unfinished period)