Put the verbs in brackets into the simple present tense:
1. ------------ you ----------- (know) how this dish is prepared?
2. When the propeller ---------------- (rotate) fast, it -------------------- (propel) the plane.
3. I --------------- (not know) whether we can reach our village safely.

Put the verbs in brackets into the simple past tense:
1. The three men ------------ (cook) their own dinner.
2. They ------------ (not know) what to do; so they ------------ (give) up the case.
3. ------------ they ------------(return) to the village?

Put the verbs in brackets into the simple future tense:
1. He ---------- (write) a letter at this time tomorrow.
2. They ------------ (not wait) till you reach there.
3. ------------- the ship sail for London next week.

Put the verbs in brackets in correct tense:
1. Everyday the teacher --------------- (reach) the school at 8 o’ clock.
2. Many students ----------- (be) absent today.
3. My friend ------------- (come) here tomorrow.
4. The lights -------------- (go) out a few minutes ago.
5. If he comes, I ---------- (inform) the matter.
6. Two years ago he ------------- (meet) with an accident.