题目内容
20．The sense of happinesswill increase（increase） if you do what you like to do．分析 如果你做你喜欢做的事情幸福感就会增加．
解答 答案：will increase
联系语境，观察句子的结构，可知此句是一个由if引导的条件状语从句；从句用一般现在时表将来，主句应该用一般将来时，也就是"主将从现"的原则；根据主句中给出的动词increase（增加），所以一般将来时的构成为will+动词原形，所以此处应该用will increase，这里的意思是"幸福感将会增加"．故填写：will increase．
点评 此题考查if条件状语从句中时态的运用．记住主将从现的原则就不难写出正确答案．
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