Question

The wall was so broad that people could stand on it.
(Pick out the modal auxiliary and state its function.)

Answer 1

could is the modal auxiliary and it's states possibility

Answer 2

The modal auxiliary used in "The wall was so broad that people could stand on it." is could.

Could:

• Could refer to a skill that a person typically possessed in the past or to something that was typically feasible in the past when it is used as the past tense of can.
• The modal verb "could" is used to express potential or past competence as well as to make recommendations and requests.
• As the conditional equivalent of "can," "could" is frequently used in conditional phrases.
• There are no tenses, participles, or infinitive forms for could.

Modal auxiliary verb:

• A verb that is used with another verb to express a mood or tense is known as a modal auxiliary.
• The verbs can, may, must, ought, shall, should, will, and would are examples of modal auxiliary verbs.
• The preposition "must" in the sentence "she must attend the party" is an illustration of a modal auxiliary.

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