Spanish verbs that end in -uir undergo a change when they are conjugated in El Presente de Subjuntivo.
Have a look at two common verbs that follow this rule:
| |
HUIR
to run away
|
CONSTRUIR
to build |
| yo |
huya |
construya |
| tú |
huyas |
construyas |
|
él / ella / usted
|
huya |
construya |
| nosotros / nosotras |
huyamos |
construyamos |
| vosotros / vosotras |
huyáis |
construyáis |
ellos / ellas / ustedes
|
huyan |
construyan |
Notice how for these verbs, -i- becomes -y- in all forms.
The endings are the same as those for -ir regular verbs in El Presente de Subjuntivo.
Look at and listen to these examples:
Mi hija quiere que yo construya una casa de madera en el jardín.My daughter wants me to build a wooden house in the garden.
¡No huyas, cobarde!Don't run away, you coward!
Tal vez huya de los problemas.He may be running away from problems.
¡Huyamos juntos sin decir nada a nadie!Let't run away together without saying a word to anyone!
El ayuntamiento no os permite que construyáis vuestra casa aquí.The council doesn't give you permission to build your house here.
Es legal que construyan hoteles altísimos en Dubai.It is legal to build [lit: that they build] very tall hotels in Dubai.
See also: List of Spanish Irregular -uir verbs (i > y) in the present and past tenses.
¡Huyamos juntos sin decir nada a nadie!Let't run away together without saying a word to anyone! Tal vez huya de los problemas.He may be running away from problems. Mi hija quiere que yo construya una casa de madera en el jardín.My daughter wants me to build a wooden house in the garden. Es legal que construyan hoteles altísimos en Dubai.It is legal to build [lit: that they build] very tall hotels in Dubai. ¡No huyas, cobarde!Don't run away, you coward! El ayuntamiento no os permite que construyáis vuestra casa aquí.The council doesn't give you permission to build your house here. 
