Final answer:
The irregular negative command conjugation for the verb 'saber' is 'no sepas,' which is the present subjunctive form of 'sepas' prefixed by 'no' to make it negative. This form is used when giving an informal command to someone you address as 'tú'.
Step-by-step explanation:
The irregular negative command conjugation for the verb saber is sepas. To form a negative command in Spanish, you typically use the present subjunctive form of the verb. In the case of the verb saber, the present subjunctive form is sepas, and when making it negative, you simply place no before it. no, if you're instructing someone not to know something or not to find out, you would say no sepas.
Step-by-step guide to forming the negative command of saber:
- Start with the yo form of the present indicative: sé.
- Remove the -o to find the stem: s-
- Find the present subjunctive form by adding the opposite vowel ending (-as, -es, -as, -amos, -áis, -an) to the stem for the tú form: sepas.
- Precede the subjunctive form with no to make it a negative command: no sepas.
This form is specific to the negative tú command. Remember to use it only in informal contexts when speaking directly to someone you would address as tú.