$1. $ Nam is interested in / fond of / keen on playing football with his friends when he has free time

$→$ S + adore(s) + Ving : Thích làm việc gì

$→$ S + tobe + interested in + Ving

$→$ S + tobe + fond of + Ving

$→$ S + tobe + keen on + Ving

$→$ Thì HTĐ : S + Ves/s

$→$ Nam là số ít nên + Ves/s

$#Arline :)))$

Nam is interested in playing football with his friends when he has free time.

Cấu trúc:  S + adore+ V.ING = S + be + interested in + V.ING : thích làm gì đó.