The sentence "Join in a project" is grammatically correct and can be used in written English.
You can use it when you are asking someone to participate in a project, or when you are giving someone an invitation to join a project. For example, "We would like to invite you to join in a project to develop a new mobile app."
The country's politicians were quick to join in, eager to project a good news story in a nation where the last big moments in the international spotlight involved a volcanic eruption and a catastrophic bank crash.
But with the broiling heat pushing the thermometer to 104 degrees, Mr. Williams stood in his blue overalls and joined in a project that has become a matter of survival for this dusty little town: shoveling dirt.
In 2003, a group of scientists and executives from the National Institutes of Health, the Food and Drug Administration, the drug and medical-imaging industries, universities and nonprofit groups joined in a project that experts say had no precedent: a collaborative effort to find the biological markers that show the progression of Alzheimer's disease in the human brain.
AIR LIQUIDE, AREVA STOCKAGE ENERGIE and INERIS join in a collaborative project to study un-ignited and ignited high pressure releases of hydrogen.
As the main Studio piece from this year's Seoul Event, Creators Drunken Tiger and digital media designer Lumpens join in an inimitable project combining hip-hop music with the burgeoning advancements of technology.
As the main Studio piece from this year's Seoul Event, Creators Drunken Tiger and digital media designer Lumpens join in an inimitable project combining hip-hop music with the burgeoning advancements of technology.
There was even a knitting tent inviting us to "join in a communal knitting project".
Howe suggested that crowdsourcing encouraged the best-qualified and most creative participants to join in on a project.
Derrick Smith, a computer scientist in the Netherlands, has invited anyone with a computer to join in an Internet-based project that runs computer simulations of how immune systems react to flu infections and vaccinations.
Our goals are to create materials to teach the needed software and strategies to undergraduates, train faculty and teaching assistants at workshops in the use of these materials, and support GEP members as they incorporate this research-based curriculum into their classes, giving their students the opportunity to join in an ongoing research project.
