ми + -емо/-ємо/-имо/-їмо

In Ukrainian, the present tense (and simple future) verb ending changes to match the subject. For the first-person plural ('we') in the present tense, the ending depends on the verb's conjugation class:

• Group 1 (First Conjugation): These verbs use the endings -емо after a consonant (e.g., пишемо) and -ємо after a vowel, an apostrophe, or a soft consonant (e.g., читаємо, п'ємо, ллємо). If a Group 1 verb has a consonant mutation, it keeps this mutation throughout the conjugation, including the 'we' form (e.g., писати -> я пишу, ми пишемо).
• Group 2 (Second Conjugation): These verbs use the endings -имо after a consonant (e.g., робимо) and -їмо after a vowel (e.g., стоїмо). Unlike Group 1, if the 'I' form has a consonant mutation, the 'we' form usually drops it and uses the regular stem consonant (e.g., ходити -> я ходжу, but ми ходимо). A notable exception is бігти (to run), which keeps its mutation (я біжу, ми біжимо).
• Athematic Verbs: A small group of very common verbs use the ending -мо directly, such as їмо (we eat) and дамо (we will give). This also applies to all of their prefixed forms (e.g., з'їмо, продамо, відповімо).

Reflexive Verbs: For verbs with the reflexive particle, it is added after the 'we' ending. Both -ся and -сь are correct, but -сь is extremely common after the vowel in the -мо ending to make pronunciation flow better (e.g., ми сміємось or ми сміємося - 'we laugh', ми дивимось or ми дивимося - 'we watch').

The Verb 'to be': The most common verb, бути (to be), is a major exception. In the present tense, it is usually omitted entirely (zero copula), so you just say 'We [are]...' (e.g., Ми вдома - 'We are at home').

Note that in many verbs across both groups, the stress shifts from the ending in the 'I' form to the stem in the 'we' form (e.g., я пишу -> ми пишемо; я роблю -> ми робимо).

Because these endings are unique to 'we', you don't always need to say the pronoun ми. This is known as pro-drop.

Note on Future Tense: If you use these same endings with a perfective verb, the meaning changes from present to simple future (e.g., ми зробимо - 'we will do'). For imperfective verbs, you can form the future tense either by using the auxiliary verb (ми будемо + infinitive, e.g., ми будемо читати) or the synthetic future (infinitive + -мемо, e.g., ми читатимемо).

Note on 'Let's...': Do not confuse these present tense endings with the first-person plural imperative ('Let's...'). The imperative uses a different set of endings (-імо, -ймо, or -мо), for example, ходімо! ('Let's go!').