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This module focuses on six tenses within two verb tense areas: The simple and the perfect tenses . The simple tenses consist of the present , the past , and the future . The perfect tenses are the present perfect , the past perfect , and the future perfect .

Verbs are conjugated to show the time an action or idea is expressed. The time conveyed by a verb is its tense . A verb tense shows the particular time in which an action took place and its relationship to when the action was spoken or written.

Each of the six tenses covered in this module has its own usage and form of conjugation.

The six tenses:

The simple tense

Simple tenses indicate simple time relationships.

The present tense expresses an action in the present or one that occurs always, repeatedly, or habitually.

Example: The horses eat the hay every day.

The past tense conveys a definite completed action in the past.

Example: The horses ate the hay last week.

The future tense communicates an action that has not yet occurred but will take place in the future. This tense uses “ will ” or “ going to ” with the past participle.

Example: The horses will eat / are going to eat the hay tomorrow.

The past participle

The past participle of a verb usually indicates a completed action and generally has the same form as the past tense. Regular forms of the past participle usually end in – d , - ed , - n , - en , or - t.

The following hand out lists the present, past, and past participle for common irregular verbs: Irregular Verb tense list

The perfect tense

A verb in the perfect tense expresses an action that was or will be completed at the time of another action or a specific occasion. The perfect tense of an action uses have or has with the past participle.

The present perfect tense expresses an action that is completed at the present time or is continuing into the present. This tense uses have or has + the past participle of a verb.

Example: The horses have eaten all the hay this morning.

The horse has eaten all the hay this morning.

The past perfect tense conveys an action that was completed before a time in the past. This tense uses had + the past participle of a verb.

Example: The horses had eaten all the hay before it rained.

The horse had eaten all the hay before it rained.

The future perfect tense expresses an action that has not yet occurred but will take place in the future. This tense uses will or going to + have + the past participle of a verb.

Example: The horses will have eaten / are going to have eaten the hay before it rains.

The horse will have eaten / is going to have eaten the hay before it rains.

Objectives

Students will learn that verb conjugation depends on the time in which an action or idea is expressed.

The students will learn that the two basic forms of verb tenses for the present, past, or future times are the simple tense and the perfect tense. They will also learn that in the present tense, a singular subject takes a singular verb and that singular verbs end with – s . Furthermore, a plural subject takes a plural verb, which does not end with – s .

Students should also learn that the perfect tense always ends with the past participle of a verb.

Questions & Answers

what is microbiology
Agebe Reply
What is a cell
Odelana Reply
what is cell
Mohammed
how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
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Source:  OpenStax, Civis project - uprm. OpenStax CNX. Nov 20, 2013 Download for free at http://cnx.org/content/col11359/1.4
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