smoking.是动名词.第一层:主句加从句
主语 the manager of the restaurant
谓语 has made
宾语 it
that 引导 以 it 为先行词的宾语从句,这个从句一直延续到句子最后.
第二层:宾语从句中的条件状语从句.
主句 a cook will be immediately fired
if 引导条件状语从句 if he is found smoking in the kitchen.
make it clear
make是动词 it是宾语 clear是形容词作状语