1) If Felix were here I would have seen him.
- This sentence uses the second conditional to express a hypothetical situation in the past. "Were" is used instead of "was" following traditional rules for hypothetical subjunctive in English.
2) Michael would not agree even if you asked him.
- This is another example of the second conditional, which is used to talk about hypothetical situations. "Asked" is the past simple form, which is used in the if-clause.
3) If they had mentioned this yesterday, everything would have been done.
- This sentence uses the third conditional to talk about an unreal past condition and its probable past result. "Had mentioned" is the past perfect tense, fitting the structure of the third conditional.
4) If I find that letter, I’ll show it to you.
- This is an example of the first conditional, used for real or possible situations in the future. "Find" is in the simple present, which is used in the if-clause of the first conditional.
5) If I meet him, I will invite him.
- Another instance of the first conditional where "will invite" represents a future simple tense used to indicate a decision at the moment of speaking.
6) Would they come if we invited them?
- This question uses the second conditional form to talk about a hypothetical situation. "Invited" is the past simple form used in the if-clause.
7) The boss will be very disappointed if you aren’t at the meeting tomorrow.
- This uses a mixed conditional structure where the result is in the future (future simple "will be"), dependent on a present condition.
8) The teacher said, “I’ll begin the lesson as soon as Jack stops talking.”
- This is a zero conditional used for general truths or actions that are bound to happen. "Stops" is in the simple present, which is standard in time clauses like "as soon as."
9) The old gentleman doesn’t go out in winter. He would go out if the weather gets warmer.
- This sentence mixes a general truth with a second conditional possibility. "Would go" indicates a hypothetical action depending on a change in the weather.
10) She’s flying to Cairo tomorrow. She’ll send her family a telegram provided she arrives with a delay.
- This is another form of the first conditional with a provision. "Arrives" is in the simple present, used here to indicate a future event that is considered in a conditional manner.
These examples represent different uses of conditional sentences, each appropriate to the context of the hypothetical or real situations being discussed.
