Different ways of saying 'If"_As long as, suppose, unless, providing, on th condition that

Different ways of saying 'If"

As long as

 > As long as we go somewhere hot, I don't mind.

Suppose (when making suggestion, between two sentences)

 >Suppose we go to America, would you like it?

unlesss (=if...not)

  >Unless I get the time off work, I won't be able to go.

Providing/provided ( 'Provided' is more formal than 'providint')

 > Providing I get the time off work, I'll go.

On the condition that..

 >On the condition that you pay me extra, I'll work over the holidya.

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-18/session-1