Computers in calssroom

 I tend to agree that young children can be negatively affected by too much time spent on the

Computer every day. This is partly because sitting in front of a screen for too long can be damaging to both the eyes and the physical posture of a young child, regardless of what they are using the computers for.

but I think spend more money for wire internet in schools like in the california it's very Expensive cost may be use part of this cost to improve education ways  and keep the children healthy.



all people must help with each other to keep our earth , last month I read in internet about how can people keep their earth clean and less carbon .

So, the government must publish law about prevent throw any rubbish in green area or around people are
We must to share with the government to give us one day in the month to clean our area and planting new trees around our area .

So, I support  with any government to publish law against carbon or any thing make our earth deity, because we live over it not another people and to teach our chiledren to learn from us who to keep their earth.



                   

3/17 Braeside Road

Greystanes NSW 2146

23 May 2012

Memorial Avenue  Merrylands

   

Dear Sir/Madom

Yesterday a headline about Holyrod  Council to ban smoking in restaurants  appeared on the front page of the Sydney Morning Herald newspaper. I am writing to support this.

Bad smell inside restaurants don't let us to enjoy our food, and the air inside restaurants can be polluted. Consequently many people can suffer from smoke. When you enter restaurants you feel you are inside a volcane  of big number of cigarettes, so we are in dilemma .

If we let peopl smoking in restaurants stem from

For & Since with Present Perfect Tense

We often use for and since with the present perfect tense.

• We use for to talk about a period of time - 5 minutes, 2 weeks, 6 years.
• We use since to talk about a point in past time - 9 o'clock, 1st January, Monday.

for	since
a period of time	a point in past time
	x------------
20 minutes	6.15pm
three days	Monday
6 months	January
4 years	1994
2 centuries	1800
a long time	I left school
ever	the beginning of time
etc	etc

Here are some examples:

• I have been here for 20 minutes.
• I have been here since 9 o'clock.
• John hasn't called for 6 months.
• John hasn't called since February.
• He has worked in New York for a long time.
• He has worked in New York since he left school

How do we use the Present Perfect Tense?

This tense is called the present perfect tense. There is always a connection with the past and with the present. There are basically three uses for the present perfect tense:

1. experience
2. change
3. continuing situation

1. Present perfect tense for experience

We often use the present perfect tense to talk about experience from the past. We are not interested in when you did something. We only want to know if you did it:

I have seen ET. He has lived in Bangkok. Have you been there? We have never eaten caviar.
past	present	future
!!!
The action or state was in the past.	In my head, I have a memory now.

Connection with past: the event was in the past.
Connection with present: in my head, now, I have a memory of the event; I know something about the event; I have experience of it.

2. Present perfect tense for change

We also use the present perfect tense to talk about a change or new information:

I have bought a car.
past	present	future
-	+
Last week I didn't have a car.	Now I have a car.

John has broken his leg.
past	present	future
+	-
Yesterday John had a good leg.	Now he has a bad leg.

Has the price gone up?
past	present	future
+	-
Was the price $1.50 yesterday?	Is the price $1.70 today?

The police have arrested the killer.
past	present	future
-	+
Yesterday the killer was free.	Now he is in prison.

Connection with past: the past is the opposite of the present.
Connection with present: the present is the opposite of the past.

Americans do not use the present perfect tense so much as British speakers. Americans often use the past tense instead. An American might say "Did you have lunch?", where a British person would say "Have you had lunch?"

3. Present perfect tense for continuing situation

We often use the present perfect tense to talk about a continuing situation. This is a state that started in the past and continues in the present (and will probably continue into the future). This is a state (not an action). We usually use for or since with this structure.

I have worked here since June. He has been ill for 2 days. How long have you known Tara?
past	present	future
The situation started in the past.	It continues up to now.	(It will probably continue into the future.)

Connection with past: the situation started in the past.
Connection with present: the situation continues in the present

Present Perfect Tense The present perfect tense is a rather important tense in English, but it gives speakers of some languages a difficult time. That is because it uses concepts or ideas that do not exist in those languages. In fact, the structure of the present perfect tense is very simple. The problems come with the use of the tense. In addition, there are some differences in usage between British and American English. How do we make the Present Perfect Tense? The structure of the present perfect tense is: subject + auxiliary verb + main verb have past participle Here are some examples of the present perfect tense: subject auxiliary verb main verb + I have seen ET. + You have eaten mine. - She has not been to Rome. - We have not played football. ? Have you finished? ? Have they done it? Contractions with the present perfect tense When we use the present perfect tense in speaking, we usually contract the subject and auxiliary verb. We also sometimes do this when we write. I have I've You have You've He has She has It has John has The car has He's She's It's John's The car's We have We've They have They've Here are some examples: I've finished my work. John's seen ET. They've gone home.