1. write the sentences in present perfect. 1 he (to graduate) from the university.2 our students (to pass) all examination.3 your son (to sleep) in his room 4 my grandmother (to prepare) breakfast in the kitchen.5 students (to go) home.6 the secretary (to bring) the mail. 7 my brother (to write) a report. 8 he (to speak) english at the meeting.9 our uncle (to catch) fish in the river. 10 students (to write) the test.

He have graduated from the University.
2 Our students have passed all examination.
3. Your son has sleeped in his room 4 My grandmother has prepared breakfast in the kitchen.5 Students have went home.6 The secretary has brought
 the mail. 7 My brother has wrote a report. 8 He has spoke English at the meeting.9 Our uncle has caught fish in the river. 10 Students have wrote the test. 

He have graduated from the University.
2 Our students have passed all examination.
3. Your son has sleeped in his room 4 My grandmother has prepared breakfast in the kitchen.5 Students have went home.6 The secretary has brought
 the mail. 7 My brother has wrote a report. 8 He has spoke English at the meeting.9 Our uncle has caught fish in the river. 10 Students have wrote the test.