习惯是表达,比如说all day long,,,,We can test the machine all day long。不用介词,long在后面1.condition可以做动词用,situation不行。2.condition强调的是条件,而situation强调的是情况。如He agreed on condition that I bombard the enemy house.他同意了,条件是我去轰炸敌人的房子。There is no problem in this situation.在这种情况下是没有问题的。3.condition有情况的意。Do you know this situation?你知不知道这种情况?But prosperity is a condition, not a value.但是繁荣是一个状况,而不是价值。以上可以自己做比较。 a +adj+uNa heavy rain\snowhave a rich breakfast\lunch\supper (一日三餐)a (good)knowledge ofhave a great interest in receive a good education give sb. a big surprisea good timea big disappointment这些要靠平时积累和背诵,不过一般情形下不是约定俗成的表示就不可以,很多是偏口语化的。定于从句;I will never forget the day when I stayed with you.时间状语从句;you can come when you are free.这里有更详尽的解释 wants to do his homework.wants to do sth, (简单)谓语部分wants; 谓语动词to do sth 是谓语动词 wants 的宾语(即不定式短语作“宾语”)复合谓语是相对于“简单谓语”的:即, 简单谓语动词 + 并列连词(and/but/ or/ so/ for/ (and) yet) + 简单谓语动词……下面的就是“复合谓语(动词)”:wants...and ...enjoysHe wants to do his homework and then enjoys some lovely music in the afternoon.并列连词连接2个以上的情况也有: 简单谓语1, 简单谓语2,简单谓语3,and/ but/...简单谓语4。