how to fix Undefined variable: project in Laravel 5.2 - php

Question

I need add comment box to My Laravel app. this is blade file for comment box in comments folder of view file
comments/form.blade.php
<form class="form-vertical" role="form" method="post" action="{{ route('projects.comments.create', $project->id) }}">
<div class="form-group{{ $errors->has('comments') ? ' has-error' : '' }}">
<textarea name="comments" class="form-control" style="width:80%;" id="comment" rows="5" cols="5"></textarea>
#if ($errors->has('comments'))
<span class="help-block">{{ $errors->first('comments') }}</span>
#endif
</div>
<div class="form-group">
<button type="submit" class="btn btn-info">Add Comment</button>
</div>
<input type="hidden" name="_token" value="{{ csrf_token() }}">
</form>
</div>
and now I am going to include this file in to the show.blade.php file in tasks folder
tasks/show.blade.php
#include('comments.form')
this is My CommentController.php
public function postNewComment(Request $request, $id, Comment $comment)
{
$this->validate($request, [
'comments' => 'required|min:5',
]);
$comment->comments = $request->input('comments');
$comment->project_id = $id;
$comment->user_id = Auth::user()->id;
$comment->save();
return redirect()->back()->with('info', 'Comment posted successfully');
}
and comment model
public function user()
{
return $this->belongsTo(User::class);
}
but got following error
Undefined variable: project (View: C:\Users\Lilan\Desktop\ratakaju\resources\views\comments\form.blade.php)
how to fix this problem?