A sentence is a group of words containing at least a subject and a verb that expresses an idea. There are three types of sentences: affirmative sentences which follow the subject-verb-object structure; negative sentences which use an auxiliary verb and "not"; and interrogative sentences, including yes/no questions marked by a question mark and WH- questions starting with interrogative words.

1. THE SENTENCE

2. A sentence is a group of words with at least a SUBJECT and a VERB. It expresses an idea.

4. SUBJECT + VERB + OBJECT(s) + ADVERBIAL

5. Negative sentences:

6. SUBJECT + AUXILIARY + NOT + VERB + OBJECT(s) + ADVERBIAL

7. Interrogative sentences:1) (YES/NO questions) AUXILIARY + SUBJECT + VERB + OBJECT(s) + ADVERBIAL? 2) (WH- questions) WH- + AUXILIARY + SUBJ + VB + OBJECT(s) + ADVERBIAL?