非常好的语法书

粗略的过了一遍，觉得非常好的书。

有许多没有注意到的小细节和长时间困扰我的都写的很清楚，就在这记一下吧：

比如当have做’possess’意时，是不能使用is having/ are having
所以只能说 I have/ I’ve got a headache.
I am having dinner. 则可.

always 我们一般就跟“现在完成时”而不能用在“现在完成进行时”，如：
John has always lived in London. (not ‘has always been living’)
昨天才写了了一个类似的句子
看来要改成: I have continuous been asking myself …. 或者 I have always asked myself …..

虽然“一般现在时/现在进行时”可表将来，但是更多是计划好的将来动作
be going to 也是计划的.
而 will/shall 表将来很可能是再说话的那一刻决定要做的事情.


have something done是请别人帮忙完成事情


Negative questions (isn’t it…?/ didn’t you…..?)
用来表疑惑：
Didn’t you hell the bell? I rang it four times.
求同意:
Haven’t we met somewhere before? Yes, I think we have.
Isn’t it a beautiful day! (It’s a beautiful day, isn’t it?)
注意Yes 和 No
Don’t you want to go to the party? → Yes.(Yes, I want to go.)
                                        → No.(No, I don’t want to go.)
可见这里的Yes 和 No是始终把问句当成肯定句来回答的。不管否定。
无论是之前的 we have met before 或者是之后的 I want to go the party.



Question tags
positibe sentence + negative tag
negative sentence + positive tag

You are not going out today, are you? → Yes.(=Yes, I am going out.)
                                              → No.(=No, I am not going out.)

Karen plays the piano, doesn’t she? → Yes.(=Yes, she plays.)
                                              → No.(=No, she doesn’t play piano.)
依旧和之前的didn’t you…? 和 isn’t it …? 一样，Yes或者No回答的都是 sentence 的肯定.

isn’t it? doesn’t she?降调↓仅仅表示求同意
It’s a nice day, isn’t it? → Yes, lovely.
Tim doesn’t look well today, does he? →No, he looks very tired.

升调才是真正的疑问↑
You haven’t seen Mary today, have you? →No, I’m afraid not.

negative sentence + positive tag来询问信息或者请求某人做某事.所以也要升调↑
You couldn’t do me a favour, could you? →It depends.