请问find后句子的时态用法,You will often find your demands couldn't be met.为什么要用couldn't 而不是can't?

请问find后句子的时态用法,You will often find your demands couldn't be met.为什么要用couldn't 而不是can't? find后加句子的有关用法例如：If you find yourself in a difficult situation.是怎样的用法啊? are you really gone?请问这是个什么时态的句子? find的后动词用什么时态 while 的用法,及其句子中时态. find后接动词的用法? 英语语态时态的用法,怎么把握句子时态中的动词时态 until的用法I’m just watching TV until I find something to do.这句语法对吗请问用until连接的话,时态有什么规定 这句before后面从句时态的用法是怎么回事?you must first establish the primary cause of waste generation before attempting to find solutions. Are you going to the movie tonight?请问这是什么时态的句子?看电影怎么没有动词see呢?既然是将来时态的话,那be going to后怎么不加动词原型? 请教Are you kidding me请问这是句什么时态的句子 hope后接什么时态的句子 you are late 请问这个句子是什么时态? (1/2)请问一下worthy 和worthwhile 的用法句子They did not find it __to prepare for 过去时态的用法 过去时态的用法 被动时态的用法 请问find 和see hear 等的用法一样吗?