Hi I've recently learnt that there is the structure 太(Adjective)了 to emphasise adjectives. Now I wonder if in the negative form we also have to end the structure with 了. This laptop is not very expensive. Which is correct? a) 这部笔记本电脑 不太贵。 b) 这部笔记本电脑 不太贵了。 Thanks in advance, G.