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Many people try to form questions by memorizing grammar rules.
That does not work for long.

Instead, always ask three simple questions in your mind:

  1. Am I asking about a state or an action?
  2. Is it present or past?
  3. Does the result matter now or not?

This decision tree helps you choose the correct helping verb logically.

Step 1: Decide — State or Action

1️1. Asking about a State

A state means:

  • no action
  • only condition, status, or situation

Examples of states:

  • availability
  • completion status
  • condition
Present State

Use: is / am / are

Examples:

  • Is the server up?
  • Are you free now?
Past State

Use: was / were

Examples:

  • Was the task completed yesterday?
  • Were you available in the morning?

Rule:
If there is no action, do not use do / did / have.

2. Asking about an Action

An action means:

  • something happens
  • someone does something

Now decide time.

Step 2: If Action → Decide Time

A. Present Actions
a) Action happening now

Use: is / am / are + verb-ing

Examples:

  • Are you working now?
  • Is the deployment running?

Use this when the action is currently in progress.

b) Habit or routine

Use: do / does

Examples:

  • Do you work on weekends?
  • Does this service restart automatically?

Use this for regular or repeated actions.

B. Past Actions

Now ask one more question.

Step 3: For Past Action — Does the Result Matter Now?

a) Result matters now

Use: has / have

Examples:

  • Have you completed the assignment?
  • Has the build finished?

Use this when the current situation depends on the past action.

b) Result does not matter now

Use: did

Examples:

  • Did you complete the assignment yesterday?
  • Did the server restart last night?

Time is finished; result is not important now.

c) Action happened before another past action

Use: had

Examples:

  • Had you completed the task before the meeting started?
  • Had the service failed before the alert came?

This is past before past.

One Golden Rule (Very Important)

Only ONE helping verb comes in a question.

Wrong:

  • Did you are working?
  • Does the task is completed?

Correct:

  • Were you working?
  • Is the task completed?

First decide state or action, then choose only one helping verb.