I'm not able to

Grammar usage guide and real-world examples

Uses a more direct contraction, suitable for conversational contexts.

Removes the contraction for a more formal, written tone.

The most formal way to express inability in academic or professional writing.

Suggests situational or professional constraints rather than a lack of skill.

Carries a stronger connotation of lacking the inherent power or skill.

Focuses on the absence of resources, time or mental bandwidth.

Implies a lack of necessary tools, training or specific preparation.

Shifts the focus from personal ability to external impossibility.

Focuses on external rules or lack of authorization.

Indicates inability caused specifically by regulations or boundaries.