Phrase 1 is a general short apology. We use this when we bump into people on the street. At other times, it sounds too weak.
In phrase 2, we use 'so', 'very' and 'terribly' to make the meaning stronger. 'Terribly' is the strongest. If we use one of the words in brackets, it is stressed.
Phrase 3 is quite formal but it's a stronger apology than just 'sorry'.
We use phrase 4 to criticise ourselves and the mistake that we have just made.
We use phrases 6 and 7 to take all the responsibility for what happened. Phrase 7 is a little stronger.
We use phrase 8 to apologise for our lack of knowledge or ability. We can replace the word in brackets with other nouns, e.g. carelessness, forgetfulness.
Phrase 9 is asking the other person not to get angry. The tone is quite informal.
Phrase 10 is often used in formal letters. The word 'sincerest' makes the apology very strong and very formal.
In phrases 1, 2, 3, 4, and 5 the speaker is introducing ideas that everybody agrees are true.
The other 5 phrases are a little less strong, saying that a few people might disagree, but nearly everybody does agree with your statement.
Phrases 1, 5, 6 and 10 are good opening phrases for a discursive essay. You can use one of these phrases to establish the importance of the topic before introducing an aspect of the topic that is not agreed.
Phrases 3, 4, 7 and 8 are often used in spoken discussions or debates.
Phrase 10 is saying that somebody has done an experiment that proves your statement to be true. If using this in writing you may want to refer specifically to scientist or the experiment itself in your next sentence.
the manner or form in which a thing is expressed in words; wording; phrasing:
delicacy of expression.
4.
the power of expressing in words:
joy beyond expression.
5.
indication of feeling, spirit, character, etc., as on the face, in the voice, or in artistic execution:
the lyric expression embodied in his poetry.
6.
a look or intonation expressing personal reaction, feeling, etc.:
a shocked expression.
7.
the quality or power of expressing an attitude, emotion, etc.:
a face that lacks expression; to read with expression.
8.
the act of expressing or representing, as by symbols.
9.
Mathematics. a symbol or a combination of symbols representing a value, relation, or the like.
10.
Linguistics. the stylistic characteristics of an utterance (opposed to meaning).
11.
Linguistics. the system of verbal utterances specific to a language (opposed to content1. ).
12.
the act of expressing or pressing out.
13.
Computers. a combination of variables, constants, and functions linked by operation symbols and any required punctuation that describe a rule for calculating a value.
14.
Genetics.
the action of a gene in the production of a protein or a phenotype.