Question

you _____ do as I say
use a modal​

Answer 1

hi here is your answer

Question ===!!!!

you _____ do as I say

use a modal

Answer ===!!!!

should

Your sentence is you should do as I say

Answer 2

The modal verb will be 'should'.

• Modal verbs are the auxiliary verbs that express necessity, possibility, advice etc..
• There are nine modal auxiliary verbs.
• There are also some quasi-modal auxiliary verbs, like ought to, need to etc..
• 'Should' is a modal auxiliary verb which is used to express advice.

The filled blank with the proper modal will be, You should do as I say.

We can also fill it with 'have to', but in that scenario the sentence will express an order.