Tout/toute/tous/toutes/tout le monde
'Tout' means 'all' , 'the whole' or 'altogether' , 'completely' , 'very' etc. In the first case, it takes different forms depending on what it precedes. Nouns following 'tout' normally take the definite form. If the noun is masculine singular, then the form 'tout' is used, if it is feminine singular, then the form 'toute' is used. If the noun following 'tout' is in the plural, then the forms 'tous' (for masculine nouns) and 'toutes' (for feminine nouns) are used. 'Tout' meaning 'completely', 'very' etc., however, does not change form except for in one case: when it determines feminine nouns and when the adjective which follows begins with a consonant , it takes the form 'toute' . When standing in an independent position, e.g after a preposition as the last constituent of a sentence, it takes the form 'tous' . 'Tout le monde' is a very common phrase in French, meaning 'all the people' , 'everybody' . It takes singular verb forms.
Examples: