What do you do if you have a headache?
What will you do if the weather's fine this weekend?
What would you do if you lost your job?
What would you have done if you hadn't gone to university?
Position→State result (try and avoid repeating "if") （说明结果，避免重复使用if）
As long as the sun's out, I'll go to the beach.
Provided that there are no clouds about, I'll head off to the beach.
Unless there's rain, I'll be making my way to the beach.
On condition that it's not overcast, the beach will be my destination.
Supposing that I was laid off, I'd head off to study overseas earlier than originally planned.
Say that I no longer had a job, I'd probably bring forward my plans to study abroad.
Support 1→Discuss the benefits（陈述优点）
The good thing about this is I'll be able to improve my English sooner than expected.
The major advantage is I may not have to wait until next year to begin my Master's Degree.
One of the strengths/merits is I'll have more time to prepare before I depart.
On the plus side I may make it over in time to attend a pre-sessional course.
The beauty of this is I can have a short holiday in England before my course begins.
One of the added benefits is I'll be able to fly over in the low season, making the air ticket about half the price.
Support 2→Mention the drawbacks（提及缺点）
The bad thing about this is I may not have enough money saved up to depart earlier.
The main disadvantage is I'll have less money to spend while I'm overseas.
One of the weaknesses/shortcomings is I may not have enough time to tie up loose ends.
On the downside my family will be upset that I'm leaving so suddenly.