Terms for subject Production containing Ли

Russian	English
вряд ли	it's unlikely (Yeldar Azanbayev)
использовать ли	whether to use (Yeldar Azanbayev)
не помните ли Вы?	do you remember (Yeldar Azanbayev)
прибегнуть ли	whether to use (Yeldar Azanbayev)