Answer:
1). Lady Montagu introduced smallpox inoculation to Europe before any other nation.
2). The children would not develop smallpox if they were inoculated with cowpox taken from the breasts of the cattle.
3). There must be a man lying down on the pavement over there. Do you think he would hurt himself?
Step-by-step explanation:
As per the instructions, the prepositional phrase 'before any other nation' begins with the preposition 'before' followed by the modifier 'any other' and the noun 'nation.' it together functions as the adverbial clause by modifying the verb 'introduced.' The first conditional or the 'if clause'('if...cattle') helps in signaling the probable consequences associated with the action. In the third statement, the use of 'must' as the modal verb assists in displaying the certainty of the action.