Question

1.they said to him '' we are learning english now''

=they told him

2.he said to me '' i must finish these works on time''

=he told me

Answer 1

1.they said to him '' we are learning english now''

=> they told him they were learning English then.

2.he said to me '' i must finish these works on time''

=> he told me he had to finish those works on time.