a) the prepositions be- / in, le- / to, mi- / from
b) b) personal pronouns – dative (to me, to you etc.)

The prepositions be- / in, le- / to, mi- / von are joined to the following word.

in, in the, by, withbe-, ba- (ba=be-ha)ב-
to, to thele-, la- (la=le-ha)ל-
from, than (eg. bigger than)me-, mi-מ-

Examples:

הוא גר בבית גדול.הוא גר בבית הגדול הצהוב.
hu gar be-bayit gadolhu gar ba-bayit ha-gadol ha-tzahov
He lives in a big house.He lives in the big yellow house.
אני הולכת למיטה.תפנה למוכר!
ani holechet la-mita.tifne le-mocher
I go to bed (to the bed).Adress a salesman!
שמואל גדול מחיים.אנחנו מציריך.
shmu'el gadol mi-chayimanachnu me-zirich
Samuel ist taller than Chayim.We are from Zurich.

Note the following expressions:

at homeba-bayjitבבית
home (where to?)habaytaהביתה
to (your) health, cheersla-briutלבריאות
actually, just so min ha-stamמן הסתם