CONECTIVOS DE CONDIÇÃO
São conjunções e locuções conjuntivas que estabelecem uma condição.

EXEMPLOS:
Ricardo E. Schütz
Atualizado em 8 de outubro de 2007
  
 
    
Se … / Desde que … / Enquanto … / Contanto que …
If … / As long as … / On condition that … / Provided (that) …
se (menos formal)
  Se você tem carro, por que ir a pé?
  Venceremos, se Deus quiser.
  Se tiver tempo, falarei com ele sobre o assunto.
  O curso só se realizará se houver número mínimo de participantes.
desde que
  A qualquer momento da vida é possível começar a atividade física, desde que se faça um programa adequado para o nível de condição naquele momento.
  FIESP é a favor do câmbio flutuante, desde que não prejudique os exportadores.
  Podem fazer o que quiserem desde que não façam barulho.
  É possível mudar de turno, desde que haja disponibilidade de vaga na turma pretendida.
enquanto
  Enquanto continuares vagabundeando por aí, não vais encontrar um rumo para tua vida.
  Enquanto houver pobreza e disparidade social, a criminalidade não diminuirá.
  Sempre haverá venda, enquanto houver consumidor.
  Portugal, enquanto ficares à espera, ninguém te pode ajudar.
  Enquanto o governo estiver "no rumo certo", contará com o apoio da grande imprensa.
contanto que (mais formal)
  Título de eleitor é vitalício, contanto que não seja cancelado por ausência injustificada.
  O psicólogo tem o direito de expor sua pessoa no ambiente virtual como bem entender, contanto que isso não transgrida as prescrições éticas próprias da classe profissional.
  Eu vou, não importa aonde, contanto que seja para frente.
  Somos a favor do uso de bio-combustíveis como alternativa aos combustíveis fósseis, contanto que se possa provar que estes bio-combustíveis são verdadeiramente auto-sustentáveis.
if (less formal)
  We will play soccer only if it doesn’t rain.
  You can more easily get a job if you speak English well.
  If you play by the rules you are welcome to stay.
  If you have a complaint, speak with the manager.
as long as
  You can leave early, as long as you finish the work.
  I’ll be glad to cooperate as long as I am notified on time.
  Unlike wood dyes, varnish stains can be applied to previously coated surfaces, as long as they are clean and free from wax or grease.
  Volunteers are available to help whenever you need them, as long as you make arrangements in advance with our volunteer coordinator.
  You can copy and use the contents of this web site as long as you cite the source.
  From the point of view of US policy makers and their mainstream media boosters, the 'cost' of a dead Afghan civilian is zero as long as these civilian deaths can be hidden from the general US public's view.
  As long as the climate change debate is fuelled by politics, the science will remain up in the air.
 

As long as we are emitting greenhouse gas into our atmosphere, we will continue to create an environment that will negatively impact the future for most life on earth.
  As long as Rupert Murdoch controls news outlets that spit out their anti-Muslim propaganda this planet is not safe for anybody.
  As long as corporate lobbyists can control government officials, corruption and poverty will exist.
on condition that (more formal)
  The law governing radio and television broadcasting gives broadcasters free and exclusive use of broadcast channels on condition that they serve the "public interest, convenience and necessity."
  The fire fighters ratified the deal on condition that the 42 men dismissed earlier be reinstated.
  We accept sailing and windsurfing bookings only on condition that each member of your party accepts responsibility for any of their injuries suffered.
  Iraqi Foreign Minister Tariq Aziz expressed his country's readiness to destroy its chemical weapons stocks on condition that Israel did the same and also signed the Nuclear Non-proliferation Treaty, to which Iraq was already a party.
  Waste incineration and oil recycling plants have been offered free to Polish companies on condition that they accept all shipments and keep all waste.
  They spoke to the police about the incident on condition that they would not be called as witnesses.
provided (that) (more formal)
  We will lend you the money provided that you can repay it within 12 months.
  The contents of this Web site may be used, downloaded, reproduced, retransmitted, reprinted or translated, provided that this copyright notice appears in all copies and provided that such use, download, reproduction, retransmission, reprint or translation is for non-commercial, educational or personal use only.
  If your goal is acquisition of communicative skills, a one-to-one lesson is a lot more effective, provided you have a qualified tutor.