Some grammar exercises for practice

Salam

I got these exercises from your friends. Thanks guys. :)

Subject verb agreement:

http://grammar.ccc.commnet.edu/grammar/cgi-shl/quiz.pl/sv_agr_quiz.htm?cgi_quiz_form=1

http://grammar.ccc.commnet.edu/grammar/cgi-shl/quiz.pl/agreement_add1.htm

http://www.wisc-online.com/objects/ViewObject.aspx?ID=WCN3302

Past Perfect:

http://www.ego4u.com/en/cram-up/grammar/past-perfect-simple/exercises