FatalErrorException in 44a7f556a7d1beef3d09ba2ba2e3c7f0 line 7: Class 'form' not found

I am using laravel 5.1 . I am following a tutorial that made in laravel 5. I am working with form but not working somewhat.

I don't know what should i do. Any type of help will be appreciated. Thank you.

via Chebli Mohamed