go on ahead

I go on ahead.

私は先に行きます

I go on ahead quickly.

私は速く先に行きます

I go on ahead quickly to the restaurant.

私は食堂まで速く先に行きます

I go on ahead quickly to the restaurant this evening.

私は今日の夕方食堂まで速く先に行きます

I go on ahead quickly to the restaurant with my friend this evening.

私は友達と今日の夕方食堂まで速く先に行きます