THESE BOOKS ARE NOT MINE OBVIOUSLY.i ONLY FOUND THIS WEB PAGE IN WHICH YOU CAN TAKE A LLOOK IN ORDER TO DECIDE TO BUY NEW AND OLD BOOKS.THIS IS REALLY A GOOD IDEA, SPECIALLY IF YOU ARE STUDYING TO BECOME AN ENGLISH TEACHER..ENJOY IT!

http://books.google.cl/books?id=6NrEZmWOMuwC&pg=PA226&lpg=PA226&dq=although+it+rained+a+lot,+they+enjoy+themselves&source=bl&ots=Dmg-t5P4KB&sig=9ZnQY2A1dgTzCiw8CARWuUEIHyw&hl=es&ei=jI_lTuW7F46btwfurrn9BA&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CCAQ6AEwAA#v=onepage&q=although%20it%20rained%20a%20lot%2C%20they%20enjoy%20themselves&f=false

http://books.google.cl/books?id=s9tbAEIawJoC&printsec=frontcover&dq=ENGLISH+GRAMMAR+BOOK&hl=es&ei=iZnlTpKKDY-ctweuybmuBQ&sa=X&oi=book_result&ct=result&resnum=1&ved=0CD8Q6AEwAA#v=onepage&q=ENGLISH%20GRAMMAR%20BOOK&f=false

http://books.google.cl/books?id=lrsrzRWJbosC&printsec=frontcover&dq=ENGLISH+GRAMMAR+BOOK&hl=es&ei=Y5rlTvjgJdGDtgexxfTVBA&sa=X&oi=book_result&ct=result&resnum=10&ved=0CHAQ6AEwCQ#v=onepage&q=ENGLISH%20GRAMMAR%20BOOK&f=false

http://books.google.cl/books?id=mB3mG2l53bwC&printsec=frontcover&dq=ENGLISH+GRAMMAR+BOOK&hl=es&ei=TpvlTom5PMautweR-snEBA&sa=X&oi=book_result&ct=result&resnum=9&ved=0CG8Q6AEwCA#v=onepage&q=ENGLISH%20GRAMMAR%20BOOK&f=false

http://books.google.cl/books?id=__6uAh8FR2kC&pg=PA374&dq=collins+cobuild+students+grammar&hl=es&ei=VJ3lTtjOE9G3tweYopnzAw&sa=X&oi=book_result&ct=result&resnum=10&ved=0CFsQ6AEwCTgK#v=onepage&q=collins%20cobuild%20students%20grammar&f=false