(that)，provided that，given, as long as，in case，suppose，supposing，on condition
that, assuming that, in the event of, in the event that等。例如:
Provided that no objection is raised，we shall hold the meeting here.
You were permitted into the hall for the film, provided you sit at the back.
Providing the survey indicates a real need，they will need funds for the new bridge.
Given time and dedication，you will succeed in your cause.
Suppose (Supposing) that the plane doesn't arrive on time, well have to postpone the
Suppose he were to see us!
Supposing something should go wrong, what would you do then?
Farmer will have a bumper harvest，assuming that the weather is favorable.
He says he'll accept your offer on condition that you are sincere.
In the event that you are right，I have been tricked and cheated.
In the event of rain，the party will be held indoors.
In case he comes，let me know.
Be quiet in case you (ashould) wake the baby.
The colonel forbade the use of artillery lest (in case) the city's industry be damaged.