《魏书·列传·卷二十三》
现在如果阻断他西去的道路，刘裕必定上岸北犯，这样就使姚兴平安无事而我方却受攻击。
今若塞其西路，裕必上岸北侵，如此则姚无事而我受敌。
If we blockade his westward route now, Liu Yu will surely land and attack the north, which will make Yao Xing safe and sound while our side is attacked.
<s>[INST] Analyze the grammatical structure of the following Classical Chinese sentence and provide its English translation: 臣上，亲拜之，未至，见人于殿上，惊叩头而退。 [/INST] Grammatical analysis: [...], English translation: When I went up to pay my respects to him, I had not yet arrived [at the foot of the steps] when I caught sight of some person in the hall, and was startled into knocking my head and retiring.</s>
Analyze the grammatical structure of the following Classical Chinese sentence and provide its English translation: 臣上，亲拜之，未至，见人于殿上，惊叩头而退。
user
Grammatical analysis: [...], English translation: When I went up to pay my respects to him, I had not yet arrived [at the foot of the steps] when I caught sight of some person in the hall, and was startled into knocking my head and retiring.
assistant