To create conditional sentences that are less likely to occur.

To provide additional information without adding complexity to the sentence structure.

To focus on actions that occur only in the past.

To replace all relative clauses in a sentence.

"Must" indicates a legal requirement, while "have to" indicates personal preference.

"Must" is used for internal obligations, while "have to" is often for external obligations.

"Must" and "have to" are interchangeable in all contexts.

"Must" is less formal than "have to."

Errors only found in spoken language

Persistent mistakes resistant to correction

Temporary mistakes that beginners make

Errors that are easily corrected with practice

Collaboration reduces the importance of grammar in writing.

Students are less likely to notice grammar errors in group settings.

Peer interactions provide opportunities for grammatical discussions and corrections.

Students can avoid grammar practice by letting others handle it.

To create emphasis or add a formal or literary tone to a sentence.

To form questions in informal settings.

To replace adjectives in a sentence for clarity.

To express a condition in a less formal tone.