The analytic form, used together with a pronoun for all persons except the 1st person plural and the impersonal, has a zero ending. The future stem is formed by adding "f" (pronounced [h] except in the impersonal) to the root. Synthetic endings exist only for the 1st person plural and impersonal. The conditional is formed by taking the stem of the future tense ("f", pronounced except in the 2nd person singular and the impersonal) and adding endings similar to the imperfect. In the second conjugation, the present stem ends in "-(a)í-", to which are added the synthetic or analytic endings. Roots ending in a slender consonant (e.g., "to tell") undergo syncope before the addition of "-í-". The endings are the same as in the 1st conjugation, but without the "-(a)i-" vowel found there. The endings of the imperfect (again the same as in the 1st conjugation, but without the "-(a)i-" vowel) are added to the present stem. As in the first conjugation, the bare root is used as the analytic form. The synthetic forms of the 1st plural and the impersonal attach their ending to the present stem. The future stem consists of the root followed by the suffix "-ó-/-eo-". This "-ó-/-eo-" replaces the "-(a)í-" of the present tense. The endings are almost as in the 1st conjugation. Synthetic endings are found only in the 1st person plural and the impersonal. As in the 1st conjugation, the conditional is formed by adding endings similar to those of the imperfect to the future stem. There are eleven irregular verbs in Standard Irish; individual dialects have a few more. Most of them are characterized by suppletion, that is, different roots are used to form different tenses. Analytic forms are indicated by the symbol +. The preterites of many irregular verbs take the nonpreterite forms of preverbal particles, e.g., (interrogative particle) and (negative particle), instead of (pret. interrogative particle) and (pret. negative particle). Some verbs have different independent and dependent forms in certain tenses; the independent forms are used when no particle precedes the verb, and also after "if" (open conditional) and the direct relative particle , while the dependent forms are used after all other particles.