I guess most of non-native english speakers would have the same trouble as i have-that is when we are speaking in english, there are many comman gramma problems in our conversation such as he eats an apple, the verb "eat",we ofter forget to put the "s" after that. and some other examples, the past tense, the plural. despite we all know those gramma terms in writing, but we still make mistakes when having a conversation. but if i take it as a serious problem to consider whether i should put "s","ed", then another problem comes out-slowing down my response, makeing other gramma mistakes without conscious.then my question is if i should take this as a serious problem, in what way i can improve it.