main [meɪn] adjective principal main [meɪn] noun [pipe] tubería f principal [wire] cable m principal mains plural noun the mains [gas, water] la tubería principal [electricity] la red eléctrica in the main adverb por lo general
Complétez la séquence avec la proposition qui convient. There's a blue pencil but … a yellow one. there isn't there aren't is there