Could 랑 Was able to 차이점_ BBC learning English

https://youtu.be/_X-9UGsR8T0

Could 🆚 Was able to

Positive sentences:

1. Could

• General

• Past ability

ex)I could run really fast when I was younger.

But we do use ‘could’ for a specific event if.
We use verbs related to senses or thought   processes.
   I could feel the wind in my face
  I could remember my coach’s advice.

2.Was able to

• Specific

• Achievement

ex)I was able to win a medal.

Negative sentences:(it’s much easier.)

Use either Could or was able to.

I couldn’t do much at school the next day.
I wasn’t able to concentrate at all.

Questions to ask:
1. Negative or positive?
2. Specific or general?
Are there any senses or thought processes?

What could you do when you were younger?
(General)
What were you able to achieve?(specific)
What could you see or heat while you were doing it?(senses)