able/capable

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. He is physically able.
    1a. He is physically capable.
  2. She is an able teacher.
    2a. She is a capable teacher.
  3. She is able to do hard work.
    3a. She is capable of hard work.
    3b. She is capable of doing hard work.
    3c. She is capable to do hard work.
  4. He is able to do murder.
    4a. He is able to murder.
    4b. He seemed capable of murder.
  5. I do not doubt his ability to do the work.
    5a. I do not doubt his capability to do the work.
  6. Raman is a lazy student; he isn’t able to finish college.
    6a. Raman is a lazy student; he isn’t capable of finishing college.
    Please correct the above. Thanks.
2

3c is incorrect. ‘Capable to’ doesn’t work.

3

I don’t think do + murder is a good/suitable collocation.