例句
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If I __ the truth much earlier, I might have gotten the opportunity to be promoted.
(A) speak (B) have spoken (C) had spoken (D) will speak -
If the government __ an import fee, as it has threatened to do for years, prices of consumer goods will increase by at least 10 percent.
(A) will impose (B) imposes (C) has imposed (D) is imposing -
Their monetary unit __ stringer if they did something about their deficit.
(A) will be (B) would be (C) can be (D) should be
句型
- If + S. + 現在簡單式, S + will/can/may + 原型動詞
- If + S. + 過去簡單式, S + would/could/might + 原型動詞
- If + S. + 過去完成式, S + would/could/might + have p.p.
心得
兩個動作的先後採用不同時態，條件要比結果提前。