If 从句（条件状语从句）主句+if 条件状语从句 if 条件状语从句，+ 主句（从句后加逗号）if 条件状语从句要用一般现时。句型结构时态 If 条件状语从句If Im hungry,I will_. If Im tired, I will_. Look and sayLook and sayeat some foodhave a restIf Im ill,_. I will see a doctorLook and sayLook and sayIf Im late,_.I will say sorry If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rainI wont_.play basketballIfyouarefreethisweekend,whatwillyoudo?IfIamfree,sleepwatch TVplay computer gamespracticeif 条件状语从句(2)句子特点：1.if 从句中用一般现在时，表示未来的
