Because lack of the fresh air,I have a headache.
I recognized him instantly I saw him.
如果要用instantly的话,改为在原句这个词前加上逗号,能通顺吗
追答这样也有语法错误,因为逗号不能分隔两句完整的句子,中间需要加连词(比如and,但这句话加and意思就很奇怪了:I recognized him, and instantly I saw him. 这样就成了“我认出他”和“我看到他的瞬间”是并列的关系。如果改成the instant的话意思是最通顺的:“在我一看到他的瞬间我就认出了他。”)