Use of English: Common Errors in English Language

Every door and window __ securely locked after service.

a) is b) are

The answer is decidedly ‘is’.

When the word ‘every’ or ‘each’ precedes a noun, it should be in singular form.

Ergo, it should be:
Every door and window IS securely locked after service.

Very importantly, the noun it precedes must always be in singular, for examples:
Every woman, not Every women;
Every girl, not Every girls etc.

See also: 10 types of students you will see when school resumes

Intriguingly enough, see this;

There is go-slow in Oshodi.❌

There is a traffic jam in Oshodi. ✔

There is a snarl-up in Oshodi. ✔

In regard to standard English, GO-SLOW has no denotation, allusion or ascription to traffic/snarl.

In literal terms, GO-SLOW — the equivalent of SLOW-DOWN in American English — is an industrial action.
It is a protest that workers make by downing their tools, or doing their work more slowly than usual, to wittingly hurt the profit of their employers.

See another poser:

Let’s share the grace before eating. ❌

Let’s SAY GRACE before eating. ✔️

You should read: 99 THINGS TO DO LIST BEFORE CONVOCATION AS AN OAU STUDENT

Also…Take note, please.

…in Jesus name.✖
…in Jesus’ name.✔
…in Jesus’s name.✔

Have a wonderful day!