to-ing and fro-ing [ˌtu:ɪŋənˈfrəʊɪŋ] ( pl to-ings and fro-ings ) noun (uncountable noun) idas fpl y venidas
Complétez la séquence avec la proposition qui convient. “Jacob and Caleb are American.” … “So Ian is!” “So are Ian!” “So is Ian!”