英语翻译句子：When I feel so bad when I feel so sad I'm longing at

When I feel so bad and sad 是I'm longing at the time we had the time I can't forget 的时间副句.
When I feel so bad I'm longing at the time .when I feel so sad we had the time I can't forget 这样看较清楚.
【 两个when 之间加的为何不是“." 而是”,“呢?】答：因为不合语意,如加“而是”即：在我伤心的时候而是在我难过的时候.行不通!
总之对歌词不能认真,首先没标点符号按中式教法全是错的.