With an appropriate conjunctive:

(1)Mr. Black is ill, ________ I'll take his place.

(2)You'd better start working harder, ________ you won't pass the course.

proper nouns

disjunct

putative should

subjunctive mood

What is the system of two tenses and two aspects?

List two types of subjunctive mood.

Using modal auxiliary:

He was the last person to commit the embezzlement.

Using cleaving for time adjunct:

I got the invitation last week.

Using an exclamation:

She has a beautiful hat.

Using extraposition:

What they are proposing to do is horrifying.