Question

The train is late. we could not catch it change into complex sentence ​

Answer 1

Explanation:

Complex Sentence consists of one principal clause and any number of subordinate clauses.

An Adverb Clause is a subordinate clause which does the work of an adverb in a complex sentence.

In this case,

Option B is correct. The subordinate clause while it is hot modifies the verb 'strike' in the principal clause. The subordinate clause answers as to when we should strike the iron. Henceforth, while it is hot is a subordinate adverb clause as it behaves as an adverb..

Option A is incorrect as the sentences have been joined by using a subordinate adjective clause.

Option C is incorrect as the sentences have been joined into a simple sentence.

Option D is incorrect as the sentence is a simple sentence.

Answer 2

Answer:

The train was late so we could not catch it.

Hope it helps!