Unit 5. Covalent Bonds

PastContinuous

Affirmative:

I/he/she/it we/you/they

was were

testing measuring carrying out etc.

For example:

· Yesterday Alex and Jim were carrying out the experiment. They began at 11 o’clock and finished at 12.30.

· I was measuring voltage during my physics class.

Compare Past Continuous (I was doing) and Past Simple (I did):

Past Continuous (in the middle of an action) · I was testinga new device when Alex called me. (in the middle of an action)

Past Simple (complete action) · I testeda new device last week. (= all the way, completely)

1. Fill in the table:

Noun	Verb	Adjective	Adverb	Translation	Transcription
	radiate
		constructive
production
	pulsate
				поглощение
heat
force
		absorbent			n
state
	perform
bond
	create
				количество
	employ
	equip				n
piece
	represent
	purify	pure			adj
				примесь
		relative
		similar
discovery
	orbit
				таблица

2. Read and translate the following international words:

Nouns (n): crystal, group, helium, radiation, radium, valence, uranium.

Adjectives (adj): central, covalent, cubic, periodic, vertical, economic(al).

Verbs (v): group, radiate, vibrate.

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