Subjunctive mood & conditionals

1. In the sentence “Water freezes at 0 °C at standard pressure”, what grammatical mood is the verb “freezes”: Indicative or Subjunctive?

2. Choose the correct form: “It is essential that the specimen ____ kept at a constant temperature” (be / is).

3. Choose the correct form: “Take shelter immediately lest the storm ____ you in the open channel” (catch / catches).

4. Choose the correct form: “The bylaws require that the treasurer ____ an audited statement every year” (submit / submits).

5. Choose the correct form: “If gravity ____ weaker on Earth, athletes could jump much higher” (were / is).

6. Choose the correct form: “The board proposed that the scholarship fund ____ expanded next term” (be / is).

7. Choose the correct form: “The judge ordered that the witness ____ the courtroom” (leave / leaves).

8. Choose the correct inverted conditional: “____ the sensor to fail, the backup alarm would sound immediately” (Were / Was).

9. Choose the correct form: “The principal insisted that the fire exit ____ unobstructed at all times” (remain / remains).

10. In the fixed expression “Suffice it to say, the experiment succeeded”, what mood is “Suffice”: Subjunctive or Interrogative?

11. Choose the correct past counterfactual: “If we ____ measured the mass before heating, we could have calculated the water lost” (had / would have).

12. Choose the correct form: “He acts as if he ____ every capital city in the world” (knew / knows).