English speakers use lot of idioms when they speak. So if you wish to speak English fluently then you must learn a lot of idioms. This is true no matter what method you use to learn English conversation.
In this video lesson, Kristin talks about the American English idiom “Knock On Wood”.
The expression “knock on wood” is said when a person wishes to avoid bad luck (to prevent something bad from happening).
Learning English online is easier when you have real English lessons. So enjoy this English conversation lesson!