The phrase "and becomes difficult to" is correct and usable in written English.
It can be used when describing a situation or process that is increasingly challenging or hard to manage.
Example: "As the project progresses, it becomes difficult to meet the deadlines due to unforeseen complications."
Alternatives: "and starts to be challenging to" or "and turns out to be hard to".
Gypsum plaster recycling shortens the setting times, changing the workability and becomes difficult to work with it.
When your event takes place once a quarter, it creates confusion and becomes difficult to generate momentum and interest for the next round.
SYNECDOCHE, NEW YORK Another beleaguered Charlie Kaufman hero, a theater director played by Philip Seymour Hoffman, takes refuge from the women in his life (Samantha Morton, Catherine Keener, Michelle Williams, Hope Davis) by burrowing into a new super-production that eventually takes over his life and becomes difficult to distinguish from it.
When work practice becomes routine, it slips to the background of the conscious awareness and becomes difficult to recognize without the context to support recall.
This raised an interesting possibility that the presence of the fusion gene imparts a more mesenchymal phenotype on a meningioma, so that it has an unusual presentation and becomes difficult to be differentiated from SFT/HPC.
Additionally, part of the clinical sociomaterial work practice is of a tacit nature, because when work practice becomes routine (know-how), it slips to the background of the conscious awareness and becomes difficult to recognize without having the context to support recall [ 10, 13, 27, 28].
Without rigorous software development and maintenance, software tends to lose its original architectural structure and become difficult to understand and modify.
The Ady Gil was then taken under tow to a French research base at Dumont d'Urville, but quickly took on water and became difficult to tow.
In announcing a second recall last week, Toyota said the accelerator pedal could wear down and become difficult to depress, slow to spring back or get stuck partly depressed.
A real difficulty these teachers envisioned in teaching about shared British values was that cultural values when internalised are durable and become difficult to change.
