| A | B |
| Let's not sing! | ¡No cantemos nosotros! |
| Let them sing! | ¡Que canten ellos! |
| We have been singing for a long time. | Hace mucho tiempo que nosotros cantamos. |
| I had been singing for a long time. | Hacía mucho tiempo que yo cantaba. |
| I sang it two days ago. | Lo canté hace dos días. |
| How long have you been singing? | ¿Desde cuándo canta Vd.? |
| Before singing,... | Antes de cantar,... |
| They want me to sing. | Desean que yo cante. |
| They wanted me to sing. | Deseaban que yo cantara (cantase). |
| They ask us to sing. | Nos piden que cantemos. |
| They asked us to sing. | Nos piden que cantáramos (cantásemos). |
| I am glad that they sing. | Me alegro de que ellos canten. |
| I am glad to sing. | Me alegro de cantar. |
| I doubt that they will sing. | Dudo que ellos canten. |
| She didn't believe that I would sing. | Ella no creía que yo cantara (cantase). |
| He denied that his brother was singing. | Negó que su hermano cantara (cantase). |
| We are sorry that he is singing. | Sentimos que él cante. |
| They were sorry that we were singing. | Sentían que nosotros cantáramos (cantásemos). |
| I am afraid that they will not sing. | Temo que ellos no canten. |
| It is necessary that she sing. | es necesario que ella cante. |
| It was doubtful that I would sing. | Era dudoso que yo cantara (cantase). |
| It is certain that he is singing. | Es cierto que él canta. |
| I hope to find a man who sings. | Espero encontrar a un hombre que cante. |
| There is no one who sings. | No hay nadie que cante. |
| Whoever sings it, will do it well. | Quienquiera que lo cante, lo hará bien. |
| We will do it when you sing. | Lo haremos cuando Vd. cante. |
| They will go out before he sings. | Ellos saldrán antes que él cante. |
| If they sing, I'll be there this afternoon. | Si ellos cantan, yo estaré allí esta tarde. |
| If I sang, it would please you. | Si yo lo cantase (cantara), le gustaría a Vd. |
| If she had sung, I would have known it. | Si ella hubiera (hubiese) cantado, yo lo habría sabido. |