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Jim had to finish the report by Wednesday
吉姆必须在星期三之前完成报告
Could is used to talk about general abilities
could用来表示一般性的能力
We use “was able to” when talking about specific situations
我们用was able to来谈论特定情况
We could be there in an hour
我们本可以在一小时内到达
Although he was late for the meeting
尽管这个会议他迟到了
He was able to find out the important information
他还是发现了重要的信息
can't have, could have
can't have, could have
might have and must have
might have和must have
express probability
表示可能性
Jim must have left the book behind
吉姆一定是把书留在那里了
Anna could not have heard that the meeting time was changed
安娜不会知道会议时间已经改变了
Should have and ought to have
should have和ought to have
express something that should have been done
表示什么事应该已经做了
We should have booked seats to the ballet earlier
我们应该早点去预定芭蕾舞剧的座位
Anna ought to have checked for mistakes in her work
安娜应该在提交其作品前
before she handed it in
就检查一下作品中的错误
We may have learned enough about past modals
我们已学不少情态动词过去式
to understand the next dialog
应该能够看懂下面的情景对话
Let's find out
来看看吧
My mum had to finish icing my cake this morning
我妈妈必须今早上给我的蛋糕包完了糖衣
We should have eaten it all ourselves
我们应该自己全部吃掉
And not shared any with the others
不要跟别人分享了
There are no other children here
这里没有别的小孩子
My mum must have forgotten to pick them up
我妈妈忘记去接他们来了
You don't have any friends
你没有一个朋友
My mum ought to have given me some presents by now
我妈妈现在应该已经给我些礼物了
We should have eaten the cake already
我们应该先就把蛋糕吃掉的
No, we can't
不，不能吃
We have to wait a little bit longer
我们还得再等一会
There is something I want to give you
我有个东西想送给你
What is it?
是什么？
A present
一个礼物
You ought to have identified some past modals
你应该已经发现了刚才情景中的
in that scene
一些情态动词了吧
Did you?
发现没？
If not, you can't have been paying close enough attention
没有的话，说明你刚才肯定没有集中注意力
Here is the dialog again without subtitles
再看一遍无字幕的情景对话
We move from the past to the future now
说完过去时，马上来学将来时
There is no mucking around on this show
本节目可不会拖拖拉拉的
It's time to review future forms
现在是复习将来时的时候了
When we make plans and decisions for the future
当我们为将来做计划或决定时
We can use going to
我们可以用going to
Anna is going to travel to Greece
安娜打算去希腊旅行
will
或者will
We will go to the movies tonight
我们今晚将去看电影
The present continuous form
或者现在进行时
I'm planning her birthday party for Saturday
我在准备她星期六的生日派对
The present simple form
又或者一般现在时
The movie starts in ten minutes
电影在十分钟后开始
We can also use going to and will to make predictions
我们还可以用going to和will来表示预测
