If + Present Tense , S + Modal Verb

　　結構︰If + 現在式，主詞+情態助動詞

　　說明︰本句型實為句型之變體。之所以用情態助動詞，主要是因為說話者對可能的結果不是太肯定或者是想表達例如必要的意思。

　　If it is fine tomorrow, we can go out.

　　如果明天天氣好，我門可以出門。

　　If it is fine tomorrow, we could go out.

　　如果明天天氣好，我門能夠出門。

　　If it is fine tomorrow, we may go out.

　　如果明天天氣好，我門可能出門。

　　If it is fine tomorrow, we might go out.

　　如果明天天氣好，我門可能出門。

　　If it is fine tomorrow, we should go out.

　　如果明天天氣好，我門宜于出門。

　　If it is fine tomorrow, we ought to go out.

　　如果明天天氣好，我門宜于出門。

　　If it is fine tomorrow, we must go out.

　　如果明天天氣好，我門必須出門。