עמוד:35

Link to Language : The Present Perfect Simple The Present Perfect Simple is used to show an event that happened sometime in the past and affects the present . The exact time is not stated because it may not be known or is not important . Example : Dr . Klein has written books about medicine . The Present Perfect Simple is formed by using : have / has + the third form of the verb ( V 3 ) Both candidates have passed Stage 1 . subject + have / has + V 3 To form the negative , add not after have 0 ^ has 0 ז use haven't 0 ז hasn't . Dr . Klein hasn't been in the military . subject + haven't / hasn ' t + V 3 To form a Yes / No question : Has Dr . Klein flown a plane ? have / has + subject + V 3 To form a Wh-question : Where has Dr . Santini worked as an astronaut ? Wh-word + have / has - subject + V 3 Third Form of Verbs ( V 3 ) The third form of regular verbs end in -ed . finish-finished study-studied The third form of irregular verbs change . be-been write-written Answer on Student Work Page 53 . 1 Complete the following sentences using the Present Perfect Simple . & Abby and Josh . .. ( be ) to the Planetarium in London . S > Dr . Davis and Dr . Simms ... ( complete ) research in physics . c Sheri ... ( read ) several books about astronomy . < 3 Ray . .. ( not , see ) the movie Apollo 13 . 2 An astronaut is giving a report to mission control . What has he done ? What hasn't he done ? Example : Commander Krohl hae checked the eolar panele . More practice on Student Work Panes 53-54 . Commander Krohl : Task Checklist Check solar panels IZI Test guidance system ם Check power system IZI Install telescope software ם Clean main air filter ם Meet with payload specialist ם Prepare daily crew meeting 0

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