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13.19 omission of words in sentences with and, but, both and or You can omit certain words
when used in conjunction with and, but, both and
or . This helps to avoid unnecessary repetition. Nouns, pronouns, articles,
possessive adjectives,
this, those etc.
2. Verbs.
3. Prepositions.
YES YES 1 We measured and
[we] calculated the values. We extracted
[the fluid band then froze the fluid Give me your name and [your] address. We need those books and [those] papers.
1 The sample can be introduced into the furnace using either a chromatographic [pump] or a peristaltic pump. NB do not say chromatographic pump or a peristaltic one .
1,3 Is it a theoretical [problem] orb ab practical problem These can be found both in animals and [in] humans.
2 The flame was low but [it was] steady. This is an expensive [way] but [it is
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