Hi, Mona, and welcome to the G.E,
is sentence 'when i need to speak I feel anxious and somehow forget all words and how to form sentences correctly"? thank for answers
First of all, you should use 'punctuation' correctly. Secondly, I think you mean to say either:
a) When I need to talk (to sb), I feel anxious and my mind goes blank.
b) When I try to speak English, I feel anxious and my mind goes blank.