Time clauses video on youtube starts at 3:00 min. Same time, Interrupted, Sequence, Period before, Link with Past and Before Now are groups that express action/event.
When I was doing my homework, my program crashed.
As I was doing my homework, my program crashed.
While I was writing a program, Marko was reading.
As I was writing a program, Marko was reading.
I made backup before my system crashed.
I started to play a game after i had bought it.
I will reply to you as soon as i receive email.
I waited until the meeting started.
I have worked in IBM since 1999.
reffer to Event / Action
I have worked in Microsoft for 4 years.
Over the last four years, I have learned a lot about ICT.
I have already signed my contract.
I have just installed new program
More links for practice: http://tillyer.net/GLOW/fsi102.htm http://tillyer.net/GLOW/fsi104.htm http://www.e-grammar.org/time-clauses/test1-exercise1/ http://www.e-grammar.org/time-clauses/test1-exercise2/ http://www.e-grammar.org/time-clauses/test2-exercise1/ http://www.e-grammar.org/time-clauses/test2-exercise2/