"have not been started" is a correct and usable phrase in written English.
You can use it to talk about a task that has not yet begun or an action that has not yet happened. For example, "The repairs to the building have not been started yet."
More than 500 planned projects have not been started, and the United States lacks a coherent plan for transferring authority to Iraqi control, a report released Tuesday concludes.
Reforms promised after past concerns were raised have not been started, nor delivered upon, and a national policy to visit victims has been effectively ignored, HMICFRS found, although it also uncovered outstanding examples of police tackling the issue.
Authors study the demonstration process of several maglev projects carried on in the countries such as Germany, Japan, America, Netherlands and U.K., and analyze the major technical parameters adopted, the relevant conclusions in engineering and economy and the reasons why these projects have not been started so far.
For parts (j in P = widehat {S}), which have not been started, we compute f j as follows.
We divide all the parts in the group into the following sets: C The parts that are currently being worked on, N The new parts that have arrived in the group, I The interrupted parts, (widehat {S}) The parts in the waiting queues that have not been started yet, S The parts in the waiting queues that have already been started.
C The parts that are currently being worked on, N The new parts that have arrived in the group, I The interrupted parts, (widehat {S}) The parts in the waiting queues that have not been started yet, S The parts in the waiting queues that have already been started.
If you have not been, start now!
The exhibits of the smaller animals, like recoon & skunk, haven't been started yet, but those of the medium-sized mammals, such as wapiti, mule deer, etc., are in the works.
And yet a surprising number of fires in recent years haven't been started by, say, lightning or even the unattended campfire that Smokey Bear persistently wags his finger against — but rather by far more surprising human acts.
The takeaway should be a nice list of fresh ideas that haven't been started before.
Finally, according to our knowledge, the novel gene discovery and molecular breeding of Epimedium new cultivars haven't been started yet due to the lack of genetic and genomic information.
