The phrase "I have mostly worked" is grammatically correct and can be used in written English.
It is a sentence fragment and can be used as part of a longer sentence. Example: "Throughout my career, I have mostly worked in customer service roles, but I also have some experience in marketing."
I have mostly worked in major cities in France, Senegal, and the United States.
Who have you been working with at ERG? I have mostly worked with Dan Kammen and the Renewable and Appropriate Energy Lab (RAEL).
During this period, I have mostly worked as a dominatrix, and my approach has always been the same—I've thought, I'm always going to be me, and you're always going to love it.
In my career as a progressive political activist and issue advocate, I have mostly worked on domestic economic issues, but in this increasingly inter-connected world, the fight for workers' rights and social justice, even for those of us working on domestic issues, has become not just an American struggle, but a global one.
I've mostly worked with first-time directors, so I find myself self-governing.
"Until then I had mostly worked on portraits, but to know the American continent, there was only one way: to become a photographic reporter".
John Donnelly describes his experience: "I've mostly worked in schools in Kent and Essex, where there has been a huge impact in bringing in artists of all disciplines.
In the past, I've mostly worked with Flash.
I had mostly worked under your auspices, but on occasion Martin and others would assign me menial tasks.
Five days after the election, Britain had a coalition government – and it has mostly worked pretty effectively ever since.
Mr. Gelb has recruited several acclaimed directors who have mostly worked outside the realm of opera.
