Can't bind to 'FormGroup' since it isn't a known property of 'form'

i have created new project using
ng new angularTutorial command (typed in command prompt)

now run project using ng serve command & press enter & wait for run (√ Compiled
successfully.)
after check output on browser & type localhost:4200 on the URL & press enter

userForm : FormGroup;

ngOnInit()
{
username : new FormControl(),
email : new FormControl()
});
}

lets add formGroup property to form tag as
[formGroup]="userForm"
AND
formControlName property to input tag as
formControlName="username" for input username
formControlName="email" for input useremail

Can't bind to 'FormGroup' since it isn't a known property of 'form'.

and also add it in imports array

here is your issue solved