Fish will die without water. 为什么用将来时呢?

Fish will die without water. 为什么用将来时呢? Man die without water 我觉得can不是也行嘛,为什么一定是will呢? a fish needs water and without water it will die. ____ A fish needs water and without watter it will die ,(so it is if you take fish out of water,___they will die为什么填they而不是it? Any living thing will die without water.是虚拟条件句,请问为什么不用would? Fish will die if there isn't water 同义句 but they will die if two or three days without water这儿if作什么用 The flowers will die without water.的同义句 we will die without air and water 哪里错了? （　）water will make fish in it （ ）为什么是选Polluted,die out 而不可以是 without water the fish in the river would die out是神什么句式