连词成句picnic,it,not,have,are,going,rains,the,we,if,tomorrow,to

If it rains tomorrow,we are not going to have the picnic.
这题考察的是if引导的条件状语从句,即便从句里有tomorrow这样明显将来时标志的单词,但条件状语从句依然要用一般现在时表达.