On the neighborhood forum

We use must and have to for necessity. They show that an action is required. Must often sounds stronger and more direct. Have to is also common when the rule or situation makes something necessary.

We use should for advice or the best choice. It is softer than must. It suggests a sensible action, but it does not sound like a strict rule.

We use might, may, and could for possibility. They show that something is possible, but not certain. In a crisis, these modals help us avoid jumping to conclusions.

Sequencing words such as first, next, then, after that, and finally help us explain the order of actions. Cause-and-effect linkers such as because, so, therefore, and as a result help us explain why one action is needed.

• We must check the parcel labels before anyone takes a box.
• Residents have to wait for the manager’s update.
• You should photograph the damaged locker lid.
• The wrong parcel might belong to Flat 5A.
• The water could have damaged one package overnight.
• The forum post may be a misunderstanding.
• First, we separate the parcels.
• Next, we compare the names on the labels.
• Then, we contact the courier company.
• After that, we post a clear notice.
• Finally, we return everything to the correct flats.
• The locker was open, so the deliveries got mixed up.

• ✕

  You must to wait.
  Correct: You must wait.
• ✕

  The parcel might is damaged.
  Correct: The parcel might be damaged.
• ✕

  First we should and then we can.
  Better: First we should check the labels, and then we can sort the parcels.
• ✕

  Because the storm, the locker broke.
  Correct: Because of the storm, the locker broke. / The locker broke because of the storm.

Choose the modal that matches the strength of the message:

• must / have to = necessary
• should = good advice
• might / may / could = possible, not certain