◇ The First Conditional
第一類條件句
「混合條件句」由兩個屬於不同時間的子句組合，其句型為「 If + 現在簡單式, can/may/might/will/should + 動詞（不定詞）」。 But if cell wall strengthening begins too late, the wall won't be sturdy enough. 一句中，If 子句為現在簡單式，第二個子句是未來式。
Example：
1. If I finish work on time, I will meet you at the restaurant for dinner.
如果我準時完成工作，我就和你在餐廳碰面吃晚餐。
2. If you don't have enough money by the end of the month, I will lend you some.
如果你月底錢不夠，我可以借你一點。
3. If you practice now, you won't have to over the weekend.
如果你現在練習，週末就不用練了。