Coursera Courses

email writing (Re-watch) - https://www.coursera.org/learn/professional-emails-english/home/welcome

Grammar and punctuation  (Re-watch) - https://www.coursera.org/learn/grammar-punctuation/home/welcome

conjunctions  (Re-watch)- https://www.coursera.org/learn/grammar-punctuation/lecture/Dg8je/conjunctions-video-lecture

Tricky English grammar  (Re-watch)-  https://www.coursera.org/learn/tricky-english-grammar/home/welcome

Public speaking - https://www.coursera.org/learn/public-speaking

business english writing - https://www.coursera.org/learn/english-for-business-writing

Courses in this specialization are good https://www.coursera.org/specializations/academic-english
https://www.coursera.org/specializations/intermediate-grammar .