What is the place of grammar in language teaching? How necessary is it for a teacher of English as a Foreign Language to have a knowledge of English grammar? How necessary is it for the teacher to have a knowledge of the grammar of the students’ language or languages?

Someone answer my questions i need them asap

Merhaba benim adım bamsu beyruk. what translation.

Can you explain how not having closed caption on the tv affected the man in the first video, when he was a child? it did not affect him it caused him to be behind and disconnected. it caused him to be ashamed of his deafness it him to understand hearing people better.