Look! The light of his office is still on. The manager must ________ (be) in his office now.

What is the difference between the infinitive marker to and the preposition to? Give one example for each.

Combining the two sentences by using a cohesive device:

Oklahoma became a state in 1907. New Mexico became a state in 1912.

What kinds of determiners are mutually exclusive and what are not mutually exclusive? Give one example for each.

Using extraposition in the following sentence:

She considers that I didn't consult her quite outrageous.

Using a cleft sentence:

President Kennedy’s 1961 White House Conference on Aging first focused the nation’s attention on the concerns of old people.

Using inversion in the following sentence:

I only realized what trouble he was in when I heard his voice trembling.

Using passive voice in the following sentence:

Didn’t they tell you to be here by eight o'clock?

Using an adjunct in the following sentence:

From an artistic point of view, the film was a great success.

Using a disjunct in the following sentence:

It is quite obvious that he does not want to go with us.

Using a non-finite verb form in the following sentence:

The chairman threatened that he would resign if his policies were not adopted.