0Google "Grammer Slammer or go to 01a05000 02a00. Google using "Basic Grammar rules" too. You'll probably get a lot of choices.02br 02br 00Good luck.02br 02br 00Anonymous.0230hrefhttp://englishplus.com/grammar/punccont.htm
0we use them in different situations . just as a short answer I can say :02br 02br 00use have or has in sentences that referce to present perfect sentences or in sentences that referce to owning or being.02br 02br 00do or does are used in questions or emphasise in common sentences. 02br 02br 00did is similar to do and does but for pas