Question

write a sentence beginning with three if clauses

Answer 1

Here are a couple of great sites on "if" clauses. After you review them and write your sentence, please repost. We will be happy to make further suggestions if needed.

http://www.englisch-hilfen.de/en/grammar_list/if.htm

http://www.ego4u.com/en/business-english/grammar/conditional-sentences

Answer 2

I don't see how one sentence beginning with three "if" clauses would be very effective. However, check these sites for some help.

http://a4esl.org/q/h/vm/if-clauses.html

http://www.englisch-hilfen.de/en/grammar_list/if.htm