| Comments on Approach 1-Processing instruction | Sum | Percentage |
| Suitable for high level students | 2 | 2.44% |
| Suitable for lower level students | 1 | 1.22% |
| Easy to understand and manage | 1 | 1.22% |
| Using in the first stage | 2 | 2.44% |
| Training listening skills | 2 | 2.44% |
| Rote-like learning | 1 | 1.22% |
| Form-meaning connection | 1 | 1.22% |
| Consolidate simple past tense | 2 | 2.44% |
| Interesting | 1 | 1.22% |
| Covering more circumstances | 1 | 1.22% |
| Expressing the ideas diagrammatically | 1 | 1.22% |
| Comments on Approach 2-Traditional instruction | Sum | Percentage |
| Suitable for lower level students | 6 | 7.32% |
| Suitable for upper level students | 1 | 1.22% |
| Easy to adopt (for teachers) | 3 | 3.66% |
| Easy to adopt (for students) | 2 | 2.44% |
| Using in the second stage | 1 | 1.22% |
| Grammatical explanation | 5 | 6.10% |
| Training in past tense forms | 4 | 4.88% |
| Highlighting Adverbial phrases | 1 | 1.22% |
| Consolidate simple past tense | 1 | 1.22% |
| Comments on Approach 3-Communicative teaching approach | Sum | Percentage |
| Suitable for upper level students | 4 | 4.88% |
| Suitable for lower level students | 3 | 3.66% |
| Using in the second stage | 1 | 1.22% |
| Easy to adopt | 2 | 2.44% |
| Communicative approach (exchange authentic information, share personal experience) | 13 | 15.85% |
| Using context | 3 | 3.66% |
| Integration of linguistic knowledge | 3 | 3.66% |
| Interesting | 2 | 2.44% |
| Grammatical explanation | 2 | 2.44% |
| Covering more circumstances | 1 | 1.22% |
| Reading and understanding past tense | 1 | 1.22% |
| Comments on Approach 4-Task-based teaching approach | Sum | Percentage |
| Suitable for upper level students | 6 | 7.32% |