You are helping with a language revision. Thank you immensely for your valuable support. I really value your constructive comments and corrections. I have learned a lot from your comments. In fact, I am short of words to describe your kind gesture.
Later, to the supervisor: Tanya has been so helpful for the past two weeks. We have had several zoom meetings where she has shown me some tricks on how to overcome Mendeley referencing challenges. She has been so patient and generous with her knowledge. Whenever I called or WhatsApp her, she would dump (I just worked later, of course) her other deadlines or commitments and attend to me. I would say she never got tired of making constructive comments on my recurrent linguistic errors. Thank you for referring me to her. Her professionalism has been unparalleled and it is good to have her around.
Deeply appreciated. The extra effort you made to send a note to your supervisor was that extra gesture that shows mutual humanity. Ubuntu.