I feel stressed from time to time.But I don't know ___

I feel stressed from time to time.But I don't know ___ I feel stressed in my study from time to time.I don't know w I feel stressed in my study from time to time. I haven't heard from Henry for a long time.But I don't know I don't know what to do At time I feel like giving up I feel loney from time to time.如何划分成分 I feel unhappy but i don't know why A bit of time to time to time to e .I Don't know what you do All the time...I miss you．But you don't know I don't have time to play. I don't have time to play en.She is very busy,i want to help her .but I don't know ___