Let's analyze the options:
Therefore, the correct completion is: "If I had known, I would have visited him." This perfectly fits the third conditional structure, indicating a past unreal condition and its hypothetical result.
"Had known" and "have visited" form the correct conditional sentence.
Explanation:
The sentence uses a third conditional structure, which is used to talk about hypothetical situations in the past that did not happen. The correct form would be: "If I had known, I would have visited." This implies that the speaker did not know something in the past, and as a result, they did not visit a place.
Structure of Third Conditional: If + past perfect, would have + past participle.
In this case, "had known" (past perfect) and "have visited" (correct form: "would have visited") would form the appropriate conditional sentence structure.
It is the sound state of mind which we are looking for. (Identify the correct simple sentence from the given options and rewrite.)
Choose the correct option from the following options to change the sentence beginning with ‘If ________’
Unless you are confident, you will not succeed.
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world