if开头的句子应该用什么时态
If 可导宾语表示“是否”义，也可以引导条件状语从句表示“如果”的含你要问时态的话那就要搞清楚它在引导条件状语从句时所用的虚拟语气的问题了。
a. 与现在事实相反的假设 条件从句 主句一般过去时（be用were） should（would）等 +动词原形 例如：If they were here, they would help you. 如果他们在这儿，会帮助你的。
含义：They are not here, they can’t help you. b. 与过去事实相反的假设 条件从句 主句 过去完成时 should（would）等+ have+ 过去分词 例如：If he had come yesterday, I should \\\/ would have told him about it.如果他昨天来的话，我会把这件事告诉他的。
含义：He did not come yesterday, so I did not tell him about it.c. 表示对将来不大可能发生的事情的假想 条件从句 主句 一般过去时 should\\\/would等 + 动词原形 were+ 不定式 should+ 动词原形 例如：If you succeeded, everything would be all right. 如果你将来成功了，一切都会好的。
If you should succeed, everything would be all right.If you were to succeed, everything would be all right.含义：You are not likely to succeed, everything will be what it is now.
愿字开头的唯美句子,十个字左右
1.愿你生命中有足够多的云翳，来营造一个美丽的黄昏。
——冰心2.愿得一人心，白首不相离。
3.愿大地是梦想的等，祝福是最长的河。
4.愿你再次想起我时，嘴角是最甜蜜的笑。
if开头的经典英语箴言
If you take this medicine,all your symptoms will fall away. 如果你使用这种药物，你的所有症状将会消失。
If he is no good, flunk him. 如果他表现不好，给他不及格。
If you cannot do it, I will understand. 如果你不能做这件事，我可以谅解If you grasp this rope, I will pull you up. 如果你抓住这根绳子，我可把你拉起来。
If you ask him, he will help you. 假如你向他请求， 他会帮助你。
