- Es importante que se acueste.
- Quiero que te acuestes a las 10 p.m.
- Mi madre espera que yo me acueste temprano.
- No quiero que te acuestes tarde.
- Os acosteis.
The first few exercises deal only with translations, but the last one deals with "vosotros/as" and "ustedes"; "vosotros/as" is used with your friends or relatives (informal) while "ustedes" is used with older people or people of high rank (formal).
MissSpanish