It was not until she come back that I watched TV.
问题描述：
It was not until she come back that I watched TV.
答
直到她回来,我看电视了。
有不明白的地方再问哟，祝你学习进步，更上一层楼！ (*^__^*)
答
直到她回来的时候我才看电视.
本句是强调句,所以看起来有点别扭.恢复一下就好了：
I did not watch TV until she came back.
希望能帮到您.