Repeating the word(s) over and over, writing them and listening to them.
If it's a specific sentence, you can record yourself saying it and repeat it.
As for learning Spanish in general, try doing all those things I said before AND listening to movies in Spanish with subtitles.
Good luck!
1.en
2.para
3.por
4.hasta
i hope that helps
1)Yo lleve este reloj la semana pasada.
2)¿Cuando encontraste esa corbata?
3)Ayer nosotros oimos esa musica en la fiesta.
4) Juanjo le vendio aquellos libros a Raquel.