Conditional
The conditional is formed using the modal "would" in front of an infinitive (dropping the word "to"). The conditional is used especially in three contexts:
1) Politeness
I would like the menu, please.
Would you have a couple of minutes for me?
2) To indicate the "future within the past":
She said she would come to the party.
I thought he would arrive before me.
3) In hypothetical constructions with "if." When "if" is followed by the preterit or the subjunctive, the conditional is expected in the second clause:
If I had the time, I would do my homework.
If you told me the truth, I would believe you.
The "if" of hypothetical expressions can be implicit:
In your position (= if I were you), I wouldn't stay here!
TEST - Build a sentence with all these words:
1. rich / would / If / buy / a / house / were / big / I
2. said / like / come / She / would / not / to / she
3. could / I / big / would / if / give / you / a / ring / I
ANSWERS 1. If I were rich, I would buy a big house. 2. She said she would not like to come. 3. I would give you a big ring if I could.