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Negative and question forms are made using the helping verb "do"
否定句与疑问句使用助动词do
and its past form "did"
以及它的过去式did
and the simple form of the main verb
以及主动词的一般式
Did you watch television last night?
昨晚你看电视了吗？
In this sentence, the helping verb is "did"
在本句中，助动词是did
and the main verb is "watch"
主动词是watch
However, a sentence is using the helping verb "be"
然而，还有一种句子使用be作为助动词
The structure is different
其结构有所不同
There are two past forms of the verb "be"
动词be有两种过去式
'I", "he", 'she" use "was"
I, he, she用的是was
and "you", "we" and "they" use "were"
you, we和they用的是were
Instead of using "do" or "did"
而不是使用do或did
we just add "not" after "was" or "were"
我们只需在was或were后面加上not即可
It was not raining yesterday
昨天没下雨
The Smiths were not at home on Wednesday
史密斯一家周三没在家
We can shorten "was not" to "wasn't"
我们可以将was not缩写成wasn't
and "were not" to "weren't"
并将were not缩写成weren't
It wasn't raining yesterday
昨天没下雨
The Smiths weren't at home on Wednesday
史密斯一家周三没在家
When we ask questions, we change the word order
当提问时，我们要改变词序
so that the verb goes before the subject
将谓语动词放到主语前面
for example
例如
Anna was in Sarah's house yesterday
Anna was in Sarah's house yesterday
would become
会写成
Was Anna at Sarah's house yesterday?
Was Anna at Sarah's house yesterday?
see if you can identify the helping verb "did"
看看你能否在下面的对话中找出助动词did
and two past forms of the verb "be"
以及谓语动词be的两种过去式
"was" and "were" in the following dialogue
即 was和were
Did you go for a walk yesterday?
昨天你去散步了吗？
No, I didn't go for a walk
没有，我没去散步
Well, it wasn't very sunny anyway
这样啊，反正天气也不是很好
Wasn't it raining?
没下雨吗？
I'm not sure. Weren't you asleep all day?
我不清楚，你不是在整天睡觉吧？
No, I wasn't asleep. I was only pretending
不，我没睡，只是装出来的
Yes you were. Was your sleep a good one?
是啊，你是在装，睡得好吗？
Yes, it was pretty good
嗯，睡得很好
Then I woke up and had to see you again
而我不得不醒来见你
At a hundred and eight
都一百零八岁了
you should be glad to wake up at all!
你该庆幸自己还能醒过来！
I hope I look that young at a hundred and eight
真希望自己一百零八岁时看上去能如此年轻
Here is the same once more, but without subtitles
再来看一遍，这次没有字幕
now we will look at time phrases often used in the past
现在我们看看过去时中常用的时间短语
at, on, in and ago
at, on, in和ago
"in", "on" and "at" are all time phrases that can be used in the past
in, on和at都可以用在过去时中
but these words can be used in the present and future, too
而它们也可以用在现在时与将来时中
to show when something has happened, we use "at" + a time
我们使用“at+时间”来描述已经发生的事
Jim went to work at 8:30am
吉姆上午8点去上班了
we can also use "on" + a day or a time
我们也可以用“on+日期/时间”
I went to the movies on Monday
周一我去看电影了
The shop was robbed on August 27th
商店在8月27日遭劫了
To be less specific
要不想这么精确的话
