What are the key principles of the Audio-lingual method?

1) perception of linguistic material should be direct rather than transferable, grammatical concepts are perceived intuitively

2) consolidate the material through imitation to teacher with maximum use of the analogy

3) native language is completely excluded from teaching

4) errors must be prevented at all costs in the course of instruction

5) students are surrounded many hours  a day  by the target language, which fosters the new language learning