generous 通常用于 It is generous of sb to do sth。如：
It was generous of you to give us so much money. 你给我们这么多钱，真慷慨。
但是可以用于 sb is generous to do sth吗？比如下面这样改一下：
You were generous to give us so much money. 你给我们这...
看到两个例句：The real trick to managing your money is not what you do — it’s how you do it. The main trick to use in any of these circumstances is the right set of keywords. 为什么一个是不定式一个是to做介词的动名词，这两个可以换吗？
...stn’tB. wasn’tC. didn’t[2] Oh, Bill, I can't have lost my keys, _____ I ?A. canB. haveC. did[3] He can't be her father, ____he?A. isB. isn'tC. can二.问题引入：查阅国内的语法资料，可以...
...词、代词、动名词作宾语。如：
I’ve worn glasses since my childhood. 我从小就戴眼镜。
We’ve come fifty miles since lunch. 我们午饭后走了五十英里了。
She’s been working in a bank since leaving school. 她中学毕业后就一直在一家银行...
...was busy yesterday,I was preparing for the exams.I was reading aloud while my brother was watching TV.我的问题是：1.第1句前半部份having dinner是进行时，为什么后半部分 they came 没用进行时?2.第2句前半部份用了 was 但是 busy 却没用ing，后半部分 preparing ...
...从句是现在、过去、将来的事情即可？I
wish that I had met
my uncle yesterday.Two
men who recently spent five days on a coral island wished
they had stayed there longer.上面的句子都是对过去没发生的事情的惋惜，只是句一是I wish（我现在希望），句二是Two...
... for some time. It was quite clear that she could not make head or tail of my announcement. She had put some order into the drawing-room by now, her housewifely instincts having got the better of her dismay; and it no longer bore that deserted look, like a furnished house long to let, which I had no...
...ir song output at night and during the day they are still singing. Singing is a costly behaviour and it takes energy. So by increasing their song output, there might be some costs of energy. ”我对其中的Singing is a costly behaviour不理解，behaviour 不是不可数名词吗？它前面怎...