Listen to the song for the strumming pattern. Very simple, yet super catchy.

B - four beats, E - two beats, Abm - two beats
C#m - four beats, # - two beats, C#m - two beats

B (x2444x@1)                 E (022100@1)     AbmGerman (133111@4)Love I could give it to you

C#m (x13321@4)           E (022100@1)     C#mGive (x13321@4)it to you, give it to you

etc.