Life in the Universe & the Future

• If a planet has no atmosphere, it cannot support life.
• If you heat water to 100°C, it boils, even in a spacecraft's kitchen.
• Astronauts feel weightless if there is no gravity around them.
• If scientists discover water on a planet, it usually means the planet could support life.

What tense is used in both parts of these sentences? Are these facts always true, or only true sometimes?

We use the zero conditional for scientific facts, laws of nature and results that are always true.

TRBilimsel gerçekleri, doğa kurallarını ve her zaman geçerli olan sonuçları anlatırken zero conditional kullanırız.

• If a planet has no atmosphere, it will not support life.If a planet has no atmosphere, it does not support life.

  The zero conditional never uses 'will'; both clauses take the Simple Present.

  TRZero conditional'da 'will' kullanılmaz; iki cümlecik de Simple Present olmalıdır.

• If you heated water, it boils.If you heat water, it boils.

  The if-clause also needs the Simple Present, not a past tense.

  TRIf cümleciğinde de Simple Present kullanılmalıdır, geçmiş zaman değil.

• If scientists find a habitable planet, humanity will have a new home.
• We will solve the overpopulation problem if we develop better technology.
• If we don't reduce our resource consumption, future generations will suffer.
• If the mission is successful, astronauts will land on Mars by 2040.

Are these situations real possibilities for the future, or impossible dreams? What tense follows 'if', and what tense is in the main clause?

We use the first conditional to talk about realistic future predictions, plans and likely results.

TRGelecekle ilgili gerçekçi tahminler, planlar ve olası sonuçlar hakkında konuşurken first conditional kullanırız.

• If we will develop better technology, we will solve the problem.If we develop better technology, we will solve the problem.

  Never use 'will' in the if-clause; use the Simple Present instead.

  TRIf cümleciğinde 'will' kullanılmaz, Simple Present kullanılır.

• If scientists find a new planet, they named it quickly.If scientists find a new planet, they will name it quickly.

  The main clause needs 'will' to express a future result.

  TRAna cümlede gelecek sonuç için 'will' gerekir.

• If we lived on Mars, we would need artificial oxygen every day.
• If humanity discovered another Earth-like planet, it wouldn't solve our problems on Earth immediately.
• What would you do if you had the chance to travel to space?
• If I were a scientist, I would focus on renewable energy.

Are these situations real or imagined/unlikely? What form of the verb follows 'if', and what comes in the main clause?

We use the second conditional to imagine impossible or very unlikely future scenarios.

TRHayal kurarken, imkansız ya da çok düşük ihtimalli gelecek senaryolarını tartışırken second conditional kullanırız.

• If we would live on Mars, we would need oxygen.If we lived on Mars, we would need oxygen.

  Never use 'would' in the if-clause; use the Simple Past instead.

  TRIf cümleciğinde 'would' kullanılmaz, Simple Past kullanılır.

• If I was a scientist, I would study black holes.If I were a scientist, I would study black holes.

  In formal/standard usage, 'were' is preferred with 'I', not 'was'.

  TRResmi/standart kullanımda 'I' ile 'were' tercih edilir.

• I wish we had cleaner energy today — pollution is such a huge problem.
• Scientists wish they knew more about distant galaxies right now.
• I wish humanity had discovered a habitable planet years ago.
• She wishes she could travel to space one day.

Which wishes are about the present, and which are about the past? What verb forms follow 'wish' in each case?

We use wish clauses when we are unhappy with a present situation, or when we regret something we did or didn't do in the past.

TRŞu anki durumdan memnun olmadığımızda ya da geçmişte farklı bir şey yapmış olmayı dilediğimizde wish cümlelerini kullanırız.

• I wish we have cleaner energy.I wish we had cleaner energy.

  For a present wish, use the Simple Past after 'wish', not the Simple Present.

  TRŞimdiki durum için wish'ten sonra Simple Past kullanılır, Simple Present değil.

• I wish humanity discovered a planet years ago.I wish humanity had discovered a planet years ago.

  For a past regret, use the Past Perfect after 'wish'.

  TRGeçmişteki pişmanlık için Past Perfect kullanılır.

Compare the time reference: 'I wish we had cleaner energy' (present wish, Simple Past) vs 'I wish we had invested in clean energy years ago' (past regret, Past Perfect) vs 'I wish I could visit space' (present wish for ability, could + base verb).