如果他不吃早餐，他上课时就会饿。
If he doesn't eat breakfast, he will be hungry in class.
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If英 /ɪf/|美 /ɪf/
doesn't英 /ˈdʌznt/|美 /ˈdʌznt/
eat英 /iːt/|美 /it/
解释
if 从句使用一般现在时否定形式 doesn't eat，主句用 will be 表示将来的结果。doesn't eat 是 don't/doesn't 否定现在时的正确形式。
If he doesn't eat breakfast, he will be hungry in class.
if 从句使用一般现在时否定形式 doesn't eat，主句用 will be 表示将来的结果。doesn't eat 是 don't/doesn't 否定现在时的正确形式。