Before even talking about physically adjusting someone, it is best to speak a little about why we would adjust a student. If you do not adjust the postures of a student since you notice he is a beginner, later it will be more difficult for him to do the posture correctly, because he has already created the “bad” habit. Students can also hurt themselves if they do not do a pose correctly.
The first adjustments that you always try to fix are issues that more than one student has in the room. How can you do that physically? You can’t, so you must VERBALLY adjust first. You can do this during your alignment when getting the clients into the poses at the beginning or perhaps once they are in the pose you can further remove any of the alignment issues you see while teaching.