Слайд #6
As any language in the world a sign language has many advantages. First of all, it is quite rich to show the most important meanings that exist in all languages. As a result, a sign language can be used to discuss any topic, from very simple to difficult. Also, it is more systematic than spoken languages. Additionally, the visual form of sign language makes a connection between form and meaning.
A sign language also has some disadvantages. Firstly, it is very complex, so it takes much time to learn the language. Secondly, it can be easily misunderstood in other countries because each sign language has similarities but at the same time one sign has different meaning in other cultures. Thirdly, it can not be totally used in the darkness because it is a visually based type of communication. And fourthly, a sign language can not be used by people who are physically disabled or do not have some parts of their body.