Make an English sentence with predicative clauses

First, the definition of predicative clauses:

Predicative clauses are placed after connecting verbs and act as predications in complex sentences.

Second, the composition of predicative clauses:

Related words+simple sentences

Third, the types of related words that guide predicative clauses:

The connecting verbs that can be connected with predicative clauses are be, look, seem, sound, apparent and so on.

Example:

The question remains whether they can help us.

The question is whether they can help us.

I couldn't seem to think of the right words at that time.

I couldn't seem to think of a suitable word at that time.

2.？ Predicative clauses guided by subordinate conjunctions, such as, as, if/though.

? Example:

? He looks the same as he did ten years ago.

? He still looks the same as ten years ago.

? It sounds as if someone is knocking at the door.

? It sounds as if someone is knocking at the door.

3. Because, why lead the predicative clause.

Example:

? That's because he doesn't understand me.

That's because he doesn't understand me. That's because ... emphasize the reason.

That's why he is angry with me.

That's why he is angry with me. (That's why … emphasize results)

4. Connective pronouns who, who, who, who, what, which, who, whatever

Connect adverbs where, when, how and why.

Example:

The question is who can we find to replace her.

The question is who can we find to replace her.

The question is how he did it.

The question is how he did it.

5. subordinate conjunction that

The trouble is that I have lost his address.

The trouble is that I have lost his address.