1. If I (worked) for this company I (would get extremely tired).
2. If I (knew) the answer for this claim, I (would tell) you. But unfortunately I don’t know at least right now.
3. If my colleagues (had known) the overseas investors were coming, they (would have met) them at the airport.
4. If she (had) enough money, she (could help) you for sure.
5. If our boss (had not missed) the plane, he (would have been) here by now.