Question

On seeing the teacher, the class became silent. change into complex sentence​

Answer 1

When the class saw their teacher, they became silent.

Answer 2

When the class saw the teacher, they became silent. -This is the complex sentence.

About complex sentences:

• There are three types of sentences -simple, compound and complex.
• Complex sentences are those which have one independent/ main clause and atleast one dependent/ subordinate clause, usually joined by a conjunction.
• Independent clause means a group of words that have a complete meaning and can stand on its own.
• Dependent clause means a group of words where we have a noun and a verb, but cannot have a complete meaning.
• In the given sentence, the phrase 'on seeing the teacher' can be changed into a dependent clause 'when the class saw the teacher'. The subject 'the class' has to be brought here.
• In the second half of the sentence, we have the independent clause, 'they (the class) became silent'.
• therefore the answer is: When the class saw the teacher, they became silent.