The phrase "aware that when a" is correct and usable in written English.
It can be used when discussing a realization or understanding that occurs under certain conditions or circumstances.
Example: "She was aware that when a decision is made, it often has far-reaching consequences."
Alternatives: "conscious that when a" or "mindful that when a".
"Thankfully, they are rare," said Cook. "It does make you aware that when a guy is bowling 90mph it is a dangerous game.
Now everyone is aware that when a man packs his wife and family and 300 rolls of color film on a luxury liner he's coming here on business.
The students seem to be aware that when a scientific discipline suppresses diversity, it can succumb to groupthink just as easily as an ecological monoculture can succumb to disease.
But he is also aware that when a reviewer describes a book as a "poet's novel", it is not usually meant as a compliment, and is a description that often comes with a hint of oversensitivity and overwriting.
Actually, as predicted by absolutely no Mayan prophecies ever, but by quite a few very silly people who aren't aware that when a calendar comes to an end – even an ancient Mayan one – you just need to pop out and buy a new calendar.
In addition, I think the public should be aware that when a corporation pays a fine for some wrongdoing, the public actually picks up one-third of the tab, since the amount of the fine can be treated as a tax-deductible item by the wrongdoer.
We also found that over half of participants were either 'moderately aware' (42%) or 'extremely aware' (21%) that when a website was visited several third-party sites were also automatically referenced.
I have long been aware that when an independent intellectual stands up to an autocratic state, step one toward freedom is often a step into prison.
Liu responded to the verdict with a statement: "I have long been aware that when an independent intellectual stands up to an autocratic state, step one toward freedom is often a step into prison.
Be aware that when an activating device (whether it be a button or lever) is beside a door, it will open it.
OK, yes, I was aware that when Indy hitches a ride on a submarine in Raiders he, somehow, rides all the way to land while clutching on to its periscope.
