" should" being used in If- clause以表示"較低可能性" e.g. I don, t think Winkie is going to the party this evening, but if I should see her, I will give her this message 注意:當我們在 main clause用上“ should”,那個“if”可 以刪除。 a e.g.: Should i see her at the party, I will give her your message a Using Present Perfect or Present continuous Tense If- clause以表示不同時態 a e.g.: If it has stopped raining, we can go out now e.g. If you are having dinner now, I will call again later ■任何"建議性"的意思都可用於 main clause e.g.: If you don't feel well, you would better see a doctor you should stay in bed you ought not to be working now why don 't you take a day off would you like me to call the doctor?◼ " should " being used in If-clause 以表示 " 較低可能性 " e.g.： I don't think Winkie is going to the party this evening, but if I should see her, I will give her this message. ◼ 注意：當我們在main clause 用上 “ should ” ，那個 “ if ” 可 以刪除。 ◼ e.g.： Should I see her at the party, I will give her your message. ◼ Using Present Perfect or Present continuous Tense in If-clause 以表示不同時態 ◼ e.g.： If it has stopped raining, we can go out now. e.g.： If you are having dinner now, I will call again later. ◼ 任何 " 建議性 " 的意思都可用於 main clause e.g.： If you don't feel well, you would better see a doctor. you should stay in bed. you ought not to be working now. why don't you take a day off? would you like me to call the doctor?