Презентация, доклад по английскому языку Запятая в английском языке/Coma

тянущиеся» и не запутывали читателя.
Неправильная пунктуация: Jane will join the conference tomorrow morning, it is dedicated to the ecological situation in the world and garbage recycling, there will be about twenty reports on the problem, and Jane will be the first to speech.
Правильная пунктуация: Jane will join the conference tomorrow morning. It is dedicated to the ecological situation in the world and garbage recycling. There will be about twenty reports on the problem. Jane will be the first to speech.

могут использоваться для разделения частей текста, которые не являются полными предложениями.

junior record in jumping!
The exhibition, a huge variety of six thousand canvases, will be held till March.
My dog came back home wet, smelly, and dirty.
During his car repair, he had to arrange the new brakes, tires, inhaler, and the clutch system.

и управления союзами (so, and, but, or, nor, for):
Studying English may seem hard, but it is pretty fascinating. 
I have repaired my car yesterday, so we definitely will use it for our journey soon. 

ставить запятую:
To win the competition, Tom must train hard day and night. 
Because my sister felt sick yesterday, we missed the last performance in the circus.
After the entrance examinations, the entrants were quite tired and went home. 

что в английской грамматике нет четко установленного правила обособления последнего элемента в серии, обычно он все же отделяется запятой:
During his youth, Tom used to play football, tennis, cricket, and chess. 
In search of pungent sensations some audacious men try alpinism, skydiving, parachute jumping, and parkour.

смысла всего предложения. Например:
My uncle’s car, a white Peugeot, should be repaired immediately. 
When Mary failed to cook dinner herself, she ordered three wonderful big pizzas and nicely served big table in the dining room. 

местами, их нужно разделять запятыми.
A dozen of dazzling, racing cars were standing at the stat ready to rush.
The café we use to visit offers tasty, cheap lunch. 

words, finally, however, therefore, nonetheless, also, otherwise, instead, thus, of course, above all, for example, as a result, on the other hand, in conclusion. Примеры:
Thus, the alpinist team finally reached the highest peak of  the chain.
Of course, Jane hoped to pass that hard exam at the first attempt.

the broken vase, saying, «I will try to paste it up.»

Advisor, presentedan overalland detailed report to the audience. — Фрэнк Джонсон, старший консультант по маркетингу, представил собравшимся полный и подробный отчет.