unable to do sth
fixed phr..fixed phr.. you use this to say that you cannot do something because you do not have the skill, time, or power.
fixed phr.. a predicative adjective phrase functioning as the negative counterpart to 'able'; it expresses a lack of capacity, opportunity, or permission to perform an action.
I am unable to attend the meeting tomorrow.
Due to the heavy snow, the trains were unable to run on time this morning.
The witness was unable to provide a detailed description of the suspect because the streetlights were malfunctioning at the time of the incident.
always followed by a 'to' infinitive and usually follows a form of the verb 'to be'.
remind students that 'unable' is more formal than 'can't' and is frequently used in professional emails or official announcements.
I am unable doing it.I am unable to do it.the phrase requires a 'to' infinitive, not a gerund (-ing form).