1. Don't talk to him now, he (thinks, is thinking) of something. ​

Question

1. Don't talk to him now, he (thinks, is thinking) of something. ​

Answer 1

1. Don't talk to him now, he is thinking of something. ​

He thinks - он считает, что / он думает, что (по его мнению);

He is thinking - он думает, размышляет.