精选优质文档-倾情为你奉上零时态条件句We use the zero conditional when the result of a condition is alwaystrue. The time is not important because it is always a fact表示客观真理，理所当然的事情 The structure is if + present simple + present simple从句一般现在。主句一般现在lf you heat ice，it melts第一时态条件句We use the first conditional to show a result of a condition that ispossible in the future表示未来可能的结果The structure is: if + present simple + will+ base verb从句一般现在。主句一般将来if it snows, l will go snowboarding第
