This document discusses reasons for learning a second language (L2) and challenges that arise, comparing learning an L2 like English to one's native first language (L1). It notes that learning an L2 can be difficult due to differences in grammar, sounds, vocabulary compared to one's L1. Effective L2 learning requires practice and is influenced by one's knowledge of language, age when learning begins, whether instruction is explicit, and the level of attainment achieved compared to an L1 learner.

2. Why do we have to learn L2 ?
*Our L2 is English

3. What is the problem of learning L2 ?
Different grammar
Different sound
Different vocabulary

4.  Practice
Practice
practice

5. comparing the L1 and the L2
when L1 = L2, learning is easy
when L1 L2, learning is difficult

6. Example of negative evidence

8. 1. Knowledge of language
L2 learners

9. 2. Age
L1 learner L2 learner

10. 3. Ultimate attainment
or
The last result

11. 4. Explicit instruction
L1 learner L2 learner

13. 