Методическая разработка по английскому языку для студентов факультета химии и химической технологии " Simple Chemistry" Алматы 2017



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түріМетодическая разработка
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мет. разработка по химии

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  • Questions
Past

Positive

Negative

had to / didn’t have to

obligation in the past:
I had to wear a school uniform when I was a child.

No obligation in the past: We didn’t have to go to school on Saturdays

must*

changes to 'had to'




should have + Ved(V3) / shouldn’t have + Ved(V3)

a past action which didn’t happen: the advice / regret is too late
You should have gone to bed earlier, now you have missed the train.

A past action which didn’t happen: the advice / regret is too late: You shouldn’t have taken that job., it was



Questions: Should I read this book?
Do I have to read this book?
The modal verb must is not used in questions, instead of it we use have to.
Notice: in scientific style the frequently used modal verb is should. We can’t say: This reaction must occur at high temperature.
We must say: This reaction should occur at high temperature.
The modal verbs “must” and have to are mainly used in everyday speech contexts.


Vocabulary
acyclic  алифатический (ациклический)
a homologous series  гомологический ряд
ethylene  этилен
International Union of Pure and Applied Chemistry  Международный совет по теоретической и прикладной химии
thane  этен
on the largest scale  в больших масштабах
industrially  на производстве
to draw  изображать
combustible  легковоспламеняющийся
odorless  без запах
propene  пропен
butene  бутен
room temperature  комнатная температура
a waxy solid  воскообразное твердое тело
allylic  аллиловый
to serve as  служить в качестве
a feedstock  исходное сырье
to participate  участвовать
petrochemical industry  нефтехимическая промышленность
polymerization  полимеризация
alkylation  алкилирование
a wide variety of  большое число
reactivity  реакционная способность
higher alkenes  высшие алкены
approximately  примерно
a liquid  жидкость
safety regulations  техника безопасности
to observe  соблюдать
a glove  перчатка
to pass an exam  сдавать экзамен
to explode  взрываться
to break the rule  нарушать правило
to dilute  разбавлять
boomerang effect  обратный эффект
to follow the rule  соблюдать правило
a laboratory assistant  лаборант
physical state  физическое состояние
molecular mass  молекулярная масса




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