零条件句ZeroConditional 　　意义：用于阐述事实. 　　结构：If+subject+simplepresent,subject+simplepresent. 　　Subject+simplepresentif+subject+simplepresent. 　　例句：IfIseeaspider,Igetpanicky. 　　IfeelclaustrophobicandimmediatelywanttogetoutofifIenteranenclosedspace. 　　第一条件句FirstConditional 　　意义：表达一个动作后的结果 　　结构：If+subject+simplepresent,subject+will+verb. 　　Subject+will+verb+if+subject+simple+present. 　　例句：Ifwemovetheofficetothe15thfloor,I'llresign. 　　I'llprobablyhaveanotherpanicattackifIseeaspider. 　　第二条件句SecondConditional 　　意义：用于表达一个假设情况后的结果. 　　结构：If+subject+simplepast,subject+would+verb. 　　Subject+would+verb+if+subject+simplepast. 　　例句：IfIdidn'tsufferfromafearofflying,Iwouldtravelmore. 　　IwouldconsultadoctorifIhadaphobia. 　　第三条件句ThirdConditional 　　意义：是用来表达如果(If)当时那样发生,另外一方面（当时）会如何（通常是指过去的事情,带有一切已经太迟而不能够补救的意思）. 　　结构：If+subject+pastperfect,subject+wouldhave+pastperfect. 　　例句：Shewasill.Shedidn’tgotowork. 　　改成第三条件句：Ifshehadn'tbeenill,shewouldhavegonetowork. 　　记得采纳哦~