Question

We may improve our speech [use model auxiliary verb functioning compulsion]​

Answer 1

Answer:

Modal auxiliary for compulsion

In English, we use modal auxiliary verbs to express ideas such as possibility, ability, obligation and compulsion. It is often possible to use the same auxiliary to express different ideas. For example, we can use 'can' to talk about ability and possibility

Answer 2

Answer:

We must improve our speech.

Hope it helps you ✌️