1. My students can use personal electronic devices to study English => Personal electronic devices 2."Tom left here yesterday " said Mary => Mary 3. Perhaps john will leave for Paris tomorrow => John 1. My students can use personal electronic devices to study English => Personal electronic devices 2."Tom left here yesterday " said Mary => Mary 3. Perhaps john will leave for Paris tomorrow => John

1.Personal electronic devices can be used to study English  by my students 
2.Mary told that Tom had left there the previous day 
3. John will probably leave for Paris tomorrow 

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1. My students can use personal electronic devices to study English 
=> Personal electronic devices can be used to study English  by my students 
2."Tom left here yesterday " said Mary
=> Mary told that Tom had left there the previous day 
3. Perhaps john will leave for Paris tomorrow 
=> John will probably leave for Paris tomorrow 

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