Present affirmative form
Base verb used for regular actions in present.
Preterit negative form
Did not + base verb indicates past non-occurrence.
Type 1 conditional — function?
Expresses real future possibilities.
Type 2 conditional — structure?
If + past simple, would + base verb.
Type 3 conditional — use?
Refers to unreal past situations.
Zero conditional — tense?
Both clauses use present simple.
Mixed conditional — purpose?
Links past unreal conditions with present or past results.
English conditional types — include?
Type 0, 1, 2, 3, and mixed conditionals.
Present perfect — structure?
Have/has + past participle.
Since — usage?
Starting point of duration in present perfect.
For — usage?
Duration of time in present perfect.
Conditional past — form?
Should have + past participle.
Zero conditional — example?
If you heat water, it boils.
Mixed conditional — example?
If I had studied, I would be successful now.
Pon a prueba tus conocimientos con 7 preguntas sobre Mastering English Conditional and Tense Structures.
1. According to the course content, how is the present affirmative form of a verb typically constructed for third person singular subjects?
2. How do the structures of Type 2 and Type 3 conditionals differ from each other?
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