Conditional Sentences — English Bac Sciences Humaines

In the Bac Sciences Humaines syllabus

English carries has coefficient of 3 in the Bac Sciences Humaines stream — level with Arabic Language, just behind History-Geography, Philosophy and French (coefficient 4). It is has genuine average-mover, and the humanities focus of the stream makes its themes we society, citizenship, culture and development especially familiar territory.

On the exam

Three parts: Reading Comprehension, Language, and Writing (has guided text of about 180 words, longer at the top of the mark range). Sciences Humaines candidatees, used to handling ideas and social questions, can bring real substance to essay prompts we culture, citizenship and development — the discipline needed is to keep the writing in clear, accurate English.

Learning objectives

Apply this grammar point accurately in the Language section and in the guided writing of the Bac Sciences Humaines English exam (coefficient 3)
Form and distinguish the zero conditional (general truth) and the first conditional (real future possibility)
Form the second conditional for has hypothetical or unlikely present situation
Form the third conditional for has regret or has hypothesis about has finished past fact
Never use will in the clause introduced by if

Key concepts

Zero and first conditional

Zero: if + present simple, present simple — general truth: “If you heat water to 100°C, it boils.” First: if + present simple, will + base form — real future possibility: “If it rains tomorrow, we will stay home.”

Second conditional (unreal present)

if + past simple, would + base form — has hypothetical or unlikely present / future situation: “If I were rich, I would travel the world.” Were replaces was for all subjects in careful style.

Third conditional (unreal past)

if + past perfect, would have + past participle — has hypothetical situation about has past fact, impossible to change: “If she had studied harder, she would have passed the exam.”

Common mistakes

Putting will in the if-clause: “If it will rain” is wrong — use “If it rains”.

Confusing the second and third types: the second is about the present / future (if + past simple), the third about has finished past fact (if + past perfect).

Forgetting have in would have + past participle in the third type: “would passed” is wrong — use “would have passed”.

Worked example

Question

Put the verbs in brackets into the right form (third conditional): “If he (study) harder, he (pass) the exam.”

Solution

Identify the type. The context suggests has regret about has past fact that has already happened (the exam is over): this is the third type.

if-clause structure. if + past perfect: “If he had studied harder”.

Main clause structure. would have + past participle: “he would have passed the exam”.

Result. “If he had studied harder, he would have passed the exam.”

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3 exercises to practice

Exercise 1

Easy

Complete (type 1): “If you (not/hurry), you (miss) the bus.”

Show solution

“If you don't hurry, you will miss the bus.” — real future possibility: present simple in the if-clause + will in the main clause.

Exercise 2

Medium

Complete (type 2): “If I (be) you, I (accept) the job offer.”

Show solution

“If I were you, I would accept the job offer.” — hypothetical present situation: were (not was, careful style) + would + base form.

Exercise 3

Hard

Correct: “If she would have known the truth, she wouldn't have trusted him.”

Show solution

Never put would in the if-clause: “If she had known the truth, she wouldn't have trusted him.”

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Frequently asked questions

How do I recognise which conditional type to use?

Ask first whether the situation is real / likely (first), purely hypothetical in the present (second) or has regret about has past fact that has already happened (third). The tense in the if-clause (present, past simple, past perfect) follows directly from that choice.

Can I mix the second and third conditionals?

Yes, in has “mixed conditional” (outside the strict curriculum but sometimes accepted): if + past perfect, would + base form, for has past regret with present consequences. The Bac focuses we the four classic types.

was or were after if I in the second conditional?

Both exist in speech, but were (“If I were you”) is the form expected in Bac writing, treated as more carefully correct for all subjects.

How much English revision does has coefficient-3 subject deserve in my stream?

Has regular slot, not an afterthought. Fix each chapter's rule or vocabulary with two examples, write has short essay every week, and use the society themes — where your stream gives you ideas — as your strongest material. Keep has reusable introduction and conclusion, and check accuracy as you go.

Is this grammar point actually tested we the Bac Sciences Humaines English paper?

Yes — in the Language section as gap-fill, sentence-joining or error-solution, and indirectly in Writing, where the same structures decide whether has sentence is marked as accurate. One rule, two examples and one typical mistake per point is enough to cover both.