adding ed

[jack]

He wants Bill to be killed.
Bill will not get killed.
She will not get killed.
He will get killed.


Why do i have to add ed to those present tense sentences? are they present perfect tense setences or just present tense?

[MikeNewYork]

He wants Bill to be killed.
Bill will not get killed.
She will not get killed.
He will get killed.


Why do i have to add ed to those present tense sentences? are they present perfect tense setences or just present tense?

The first sentence is present tense. The other three are future tense.
The tense of a sentence depends on the main verb. In all four sentences "killed" is the past participle of the verb "kill". In all four sentences, this participle is used to form the passive voice. This is formed by [from of "to be"] + past participle. "Get" is used to replace the "to be" form (informal use).

The active voice infinitive of "kill" is "to kill".
The passive voice infinitve of "kill" is "to be killed" (to get killed).

He gets killed (he is killed). [present tense, passive voice]
He got killed (he was killed). [past tense, passive voice]
He will get killed (he will be killed). [future tense, passive voice]

[jack]

why can't i say:
"Bill needs to be kill."


doesnt adding ed to killed make it past tense?

[MikeNewYork]

why can't i say:
"Bill needs to be kill."


doesnt adding ed to killed make it past tense?

You can't say "to be kill" because a passive infinitive can only be formed with the past partciple of a verb. "Killed" is the past participle of "kill".

The verb "kill" is regular.
present tense/infinitive": kill
past tense: killed
past participle: killed

More about passive voice here:

http://webster.commnet.edu/grammar/passive.htm

[jack]

You have killed him
I cannot believe this. <-- why not believed? What kind of sentence is this, like is it a present perfect?
I have believed you. <---this one have ed? is it b/c it is a present perfect?

[Tdol]

I cannot believe this = present tense. Can + bare infinitive.

I have believed you- this would not work here. This means that the believing is in the past, not now.

[jack]

I have believed you- this would not work here. This means that the believing is in the past, not now.

I have believed you <-- why doesn't the believing means it is believed in the past and it is still being believed? b/c that sturcture a present perfect?

[Tdol]

I have believed you = in the past, but probably no more.

[jack]

I was supposed to woke up at 8. <---why can't i use woke? i am talking about a past event?
I was supposed to wake up at 8. <---why is wake correct?


Can you kill bill? <--correct?
or is it
Can you killed bill? <--correct?
why?

Does Bill needs to be killed? <--correct?
or is it?
Does Bill needs to be kill? <--correct?
Why??

"i wanted to sat down" I know the 2nd one is correct. What kind of error is the first one? Like is it a subject verb agreement or verb form or something, so i can look this up and read more about how to use it?
"I wanted to sit down."

[MikeNewYork]

I was supposed to woke up at 8. <---why can't i use woke? i am talking about a past event?
I was supposed to wake up at 8. <---why is wake correct?

In that construction "wake" is an infinitive. As such, it has no past tense form.

Can you kill bill? <--correct?
or is it
Can you killed bill? <--correct?
why?

Gain, following an auxiliary verb, such as "can", we use the base/infinitive form of the verb. "Kill" is correct.

Does Bill needs to be killed? <--correct?
or is it?
Does Bill needs to be kill? <--correct?
Why??

Does Bill need to be killed? We don't add an "s" after verbs used with the auxiliary "does". Use the base form.

"To be killed" is a passive infinitive. The passive voice requires A form of "to be" + the past participle of the verb, which is "killed".

"i wanted to sat down" I know the 2nd one is correct. What kind of error is the first one? Like is it a subject verb agreement or verb form or something, so i can look this up and read more about how to use it?
"I wanted to sit down."

Again, "to sit" is an infinitive. That uses the base form of the verb. "Wanted" is past tense; we don't change the base form in a regular infinitive. :wink: