Positive sentence: I saw him yesterday.
Negative sentence: I didn’t see him yesterday.
Question: Did you see him yesterday?
Questions (special)
What
How long
How
How much
Whom
When
Where
Why
|
did
|
I, you, we, they
he, she, it
|
see him yesterday?
|
Questions to the subject
Who
What
|
dissolved acid ?
dissolved in acid?
|
When we use this tense:
We mainly use this tense when we talk about past actions. We use this tense with the following adverbs: yesterday, last week/month/year, in 1990. We use this tense when we specify the time of the action. For example: I saw him in 1980.
Verb to be
Positive sentence
I, she, he, it
|
Was
|
You, they, we
|
Were
|
Negative sentence
I, she, he, it
|
Was not (wasn’t)
|
you, they, we
|
Were not (weren’t)
|
Question (general)
Was
|
I, she, it, he
|
Were
|
you, we, they
|
The word order of special questions with the verb “to be” in Past Simple is similar to the word order in special question in Present Simple.
Vocabulary
a property – свойство
to divide into – делить на
a chemical element – химический элемент
a metal – метал
a nonmetal – не металл
a good conductor – хороший проводник
heat – тепло
electricity – электричество
to form – образовывать
an alloy – сплав
with – с
at least – по крайней мере
a basic oxide – основной оксид
an appearance – внешний вид
to subdivide into –подразделять на
a chemist – химик
a periodic table – периодическая система
from left to right – слева направо
alkali metals – щелочные металлы
alkaline earth metals – щелочноземельные металлы
lanthanides – лантаноиды
radioactive actinides – радиоактивные актиноиды
transition metals – переходные металлы
specialized subcategories – специализированные подкатегории
refractory metals – тугоплавкие металлы
noble metals – благородные металлы
relatively – относительно
soft – мягкий
hard – твердый
most – большинство
silvery – серебристый
high – высокий
room temperature – комнатная температура
shiny – блестящий
brittle – хрупкий
to exist – существовать
amphoteric – амфотерный
a weakly acidic oxide – слабо кислотный оксид
dull – тусклый
coloured – цветной
an open structure – решетчатая структура
to tend – иметь тенденцию к
to gain an electron – получать электрон
to lose – терять
a poor conductor – плохой проводник
to obtain – получать
to study – изучать
metalloids – металлоиды
to share an electron – отдавать электрон
to conduct – проводить
an electrical conductor – электропроводник
a thermal conductor– теплопроводник
ionization energy – энергия ионизации
to find naturally – находить в природе
a large amount – большое количество
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