"I was revising" is correct and usable in written English.
You can use it when you want to talk about an activity you were doing in the past. For example: "Yesterday evening, I was revising for my math test."
The first few days of quitting were really hard as I was revising for my exams and that's usually when I feel like I need a cider.
Then, as I was revising the story prior to the Presidential election and during the first months of the new Administration, I found myself wondering what Hassan, Sara, and Hina would think of the election cycle and how each of them might be affected by the increasingly toxic rhetoric around Muslims and immigration.
Most of "The Wild Things" was written back in 2005, before I started on "Zeitoun," but I will say that there were a few weeks this past year when I was revising "The Wild Things" and working on "Zeitoun" around the same time, and that was an odd experience.
"When we were in Australia for the Ashes in the winter I was revising for my exams.
"I was revising for a history exam and using Google, clicking in and out of search results, and it seemed quite inefficient.
Nonetheless, as this brief survey indicates, the self-relation they thereby attribute to themselves is extremely difficult to pin down.[22] I am grateful to Sven Nyholm for prodding me to see ways in which I could improve the entry when I was revising it for the first time.
I'm revising my forecast to tense.
"Right now I'm revising 'the feminisation of poverty' in the library while reading your updates on my phone".
To connect with a colleague, ask, "Hi Penelope, I'm revising my CV and am curious if we can each get new ideas by exchanging CVs.
But, at some stage when I'm revising, I read all the scenes from a thread in one long gulp to make sure that they have narrative and emotional logic.
The next play, which I'm revising, is called 'Ravishing the Muse,' and I describe it as a Restoration comedy with a touch of surrealism, written in the 21st century".
