1.
a. Trees which fell in the storm have been removed.
b. Trees falling in the storm have been removed. ( Why can't we use reduced relative clause here?)
2.
a. Trees which fell in the storm have resulted in several accidents.
b. Trees falling in the storm have resulted in several accidents.( Why reduced relative clause used here?)
3.
a. Teams which have completed the first round go into the quarter-finals.
b. Teams completing the first round go into the quarter-finals.(Why reduced relative clause used here?)
4.
a. Students who need extra help should see a tutor.
b. Students needing extra help should see a tutor.
c. Students need extra help should see a tutor.
( Which form should I use b or c. If I use two forms b and c, then do they express the same meaning?) Please help me I am confused.
sources:
1.
http://random-idea-english.blogspot.in/2012/02/reduced-relative-clauses-lesson-and.html 2.
http://webcache.googleusercontent.com/search?q=cache:IXK0ErWrNmgJ:www.mtsac.edu/writingcenter/dlas/Reduced%2520Adjective%2520Clauses%2520online%2520DLA.docx+&cd=5&hl=en&ct=clnk&gl=in