One should carefully avoid the following types of statements: [...] 3. Subjective In place of the statements: a. We add '-l' to the root. b. You can see the suffix in the past-tense forms. Use: a. '-l' is added to the root. b. The suffix occurs in the past-tense forms or The past-tense forms contain the suffix. In so far as possible, the linguist should be completely objective about descriptive statements. [...]
- Nida (1949), a pag.241