"Winter will come" 中,为什么come不加s ,"winter"不是第三人称单数形式吗

Winter will come 中,为什么come不加s ,winter不是第三人称单数形式吗 Swallows fly to the south before winter _____ .A.will come B.is coming D.is going to come the winter holiday (come) soon 英语考试作文的几点语法对不对1.The winter holiday will come soon2.because前面加逗号 Swallows fly to the south before winter ( )1.will come 2.is coming 3.comes 4.is going when winter comes,the leaves will fall.中will能否换为are going to?为什么? Swallows fly to the south before winter comes .中文,为什么用comes而不用will come ,或is coming,或Is going to come Spring come after winter.改为一般疑问句! spring ______(come)after winter.怎没做? winter comes 为什么 come要用复数 Winter is ( ) and spring has come. I do hope you will come.中do -----------will you come back中填how soon还是when We know it was spring when the robins came .When they left,we know the winter ___A,came B.will come C.was coming,选哪个为什么 We have come to the conclusion ______ this winter will be much colder than before.a、it b、which c、what d、that单选 will come还是will be come 短文改错：至少有10处错误. Dear Bill: I'm very happy that you will come to Beijing that winter.Dear Bill: I'm very happy that you will come to Beijing that winter. My family and I do both we can to make you feel at the home. During y Winter will soon be here翻译