UFS111 4th Vocabulary Entry

CHAPTER 7 :PAST SIMPLE PASSIV
  Active sentences in the simple past tense have the following structure

            Subject + past tense form of the verb + object 
                     Passive sentences in the simple past tense have the following structure:

Object of the active sentence + was/were + past participle form of the verb + by + subject of the active sentence 

For example is : Changing an assertive sentence into the passive

Active: He wrote a letter.
Passive: A letter was written by him.
Active: They knew it.
Passive: It was known to them.
Active: She sang a song.
Passive: A song was sung by her.

Changing a negative sentence into the passive

Active: She did not know anything about it.
Passive: Nothing about it was known to her.
Active: Nobody could discourage him from pursuing his path.
Passive: He could not be discouraged from pursuing his path by anybody.
Active: You did not listen to me.
Passive: I was not listened to by you.

CHAPTHER 8. MODAL VERB

Must is a modal auxiliary verb. It is followed by a main verb. The structure is:

subject + must + main verb

The main verb is the base verb (infinitive without "to").

Look at these examples:

subject	auxiliary must	main verb
I	must	go	home.
You	must	visit	us.
We	must	stop	now.

Must is an auxiliary verb. It is followed by a main verb. The structure for must not is:

subject + must not + main verb

Must not is often contracted to mustn't.

Look at these examples:

subject	auxiliary must + not	main verb
I	mustn't	forget	my keys.
You	mustn't	disturb	him.
Students	must not	be	late.

NB: like all auxiliary verbs, must CANNOT be followed by "to". So, we say:

• You mustn't arrive late. (not You mustn't to arrive l