Level of learners

Basic: 

These learners had no contact with English language at all. 

They are not familiarity with any topic and concepts in English.

They use a lot gestures to communicate everything

Intermediate: 

These learners understand more.

They can explain something unknown through another phrases.

Some of them speak slowly, with mistakes in structure.

Advance:  

These learners are prepared to participate in a conversation.

They can talk about almost every topic.

They look comfortable using English language.