Modal verbs: can, could, be able to

Omg. difficult title, I don't know about modal in description nothing. This word is first that say about type of it, define as adjective.

Yes, I know about verbs, thay may be with to, or include mods, or not, or anithing else ... But here, each verb have additional verb for describe. Yes, it looks as adverb before verb, not in the end of the sentense.

It's equal pair of adjective + noun, but show as modal + verb, no adverb in the end. English like to change order for better accent ... Yes, that provide good effect to take important from the description and set in in the front.

I think, it's good example when we can use this method for the verbs, where description of the verb is very important and must be before verb. We must be ready to understand how to perceive the verb. Also, it's special, this is special group of verbs that similar adverbs.

Can

Can is first in the order ... could is the second, also third is be able to. I know that could here for past form of the can, how one of two possible methods. And be able to is right for the past or future. But order say, that could must be before them.

• He can swim.
  
• He can't swim.
• Can he swim?
• How can he swim?
  

Can like for mark ability.

Could

Example: People or humans too, could not find survivors. Only for the past.

• ... could ...
  
• ... couldn't ...
  

Also questions possible to.

be able to

• ... will be able to ...
  
• ... won't able to ...
  
• ... was able to ...
• ...wasn't able to ...
  
• ... were able to ...
  
• ...weren't able to ..
  

Also questions possible to.

Order

What is the ability? Story describe dogs who can find anithing that people or humans can't ... They have ability as example. It works may be 10.000 years.

It looks like to understand it before use it in the present, or in the past, or the future.

Description: How can dog help us?

Answer define can I contunue or not. They are don't know. They are asking me or you.

Can, could, be able to ...

Now, I can be ready for write about this by the order, with content.

Picture

Humans on the picture move their look for the ..., or close their view, or use paper for this, or the first looks for the front.

People searching anithyng on the second picture, dog help for them.

The picture of the robot on the third.

In the historical order third is right to be last. Oh, yes, dog may help when people can't, but dogs may help when people with the open eyes ...

Robot

Hm, why does the robot help for the people? I think it's easy to understand ...

Question

Why are dog very good for find people?

Answer: they are can hear, see and smell much better than humans.

Oh, seven terms: how to

• Can is first, I understand that important for this, repeating, nature' legacy. Common terms for this.
• How is ability work? Could is right for it, because I must check previous experience.
  
• Group them by could / couldn't ... by name that include link to the order how to do it, that I know.
  
• Will be possible to say about who was/were able to, who will be able to, or not. Oh, yes. I should repeat this loop for use finally! ...

Hm ...

May be I must do anything ...

How to

• the can is first for define ability, may be around
  
• the could for searching past experience
• the was or were able to check past experience accurate, personality
  
• the be able to for personal or other accurate methods
• the will be able to may be better with completed future thetoric