Usted' can be shortened to 'Ud' and 'ustedes' can be shortened to 'Uds'. Irregular verbs in the present tense in Spanish Irregular verbs don’t follow the usual pattern in the present tense.

but the most common one you will use besides the present tense will be the past tense. Normally in the past tense, you do not need to worry about subject-verb agreement because you can conjugate most ...