Report statments - that clause

Question 1

Usually use that clause in a reported clause.
Sometimes that can be left out:
Agree, mention, notice, promise, say and think.
Sometimes that cannot leave out:
Answer, argue, reply, complain, confide, deny, grumble, speculate, warn.
In formal writing,
When THAT doesn’t immediately follow the verb.

Answer 1

He said (that) he was enjoying his work.
The members of ONU warned that further action might be taken.

Question 2

Some verbs have an alternative with OBJECT+TO INFINITIVE:
feel, acknowledge, assume, believe, consider, declare, expect, find, presume, report, think, understand.

Answer 2

I felt that the results were satisfactory.
I felt the results to be satisfactory.

Question 3

Some verbs must include an object between the verb and the that clause:
Notify, assure, convince, inform, persuade, reassure, remind, tell.

Answer 3

I notified the bank that I had changed my address.

Question 4

In other verbs, an object is not necessary:
Promise, advise, show, teach, warn.

Answer 4

They promised (me) that they would come to the party.

Question 5

Some verbs need to include a preposition before the object in a THAT clause:
TO: Admit, point out, announce, complain, confess, explain, indicate, mention, propose, recommend, report, say, suggest.
WITH: agree, argue, check, disagree, joke.
OF: ask, demand, require.

Answer 5

She admitted (to me) that she was very ill.
I pointed out (to the driver) that he had parked across the entrance.

We agree (with Ella) that the information should go no further.

The company demands (of its staff) that they should be at work by 8 am.