Fill in the Blanks Fill in the Blanks: Mastering Modal VerbsOnline version Test your knowledge of modal verbs by filling in the blanks in this engaging game! by Goshi 1 will have could should to had to Tengo que viajar a España : I travel to Spain . Tuve que viajar a España : I travel to Spain . Viajaré a España : I travel to Spain . Pude viajar a España : I travel to Spain . Debería viajar a España : I travel to Spain . 2 have didn't shouldn't couldn't have won't to don't to No pude hacer tarea : I do homework . No debería hacer tarea : I do homework . No tengo que hacer tarea : I do homework . No haré tarea : I do homework . No tuve que hacer tarea : I do homework .