85
12.10 have to, must: affirmative and negative 1. All solvent evaporation steps
have to / must be done under nitrogen and protected from light. If not, there could be critical problems later on in the process.
2. Grouping persons according to a specific disability
does not have to / must not in anyway lead to stereotyped inferences about them, as this could have serious consequences.
3.
The above comments do not have to / must not betaken as a condemnation of an otherwise brilliant paper.
4. The contribution of the teacher
has to / must betaken into account, as it is a fundamental factor in learning process.
5. Therefore, to perform
this delicate operation, the surgeon
has to / must have a good understanding of anatomy.
6. These containers
have to / must be larger than the normal ones otherwise the samples will not all fit in.
7. This business
does not have to / must not make a payment in such cases – in fact all payments are made on their behalf by the insurance company.
8. This is the
policy of the journal and it has to / must be respected.
9. This method has the added advantage that the sample
does not have to / must not be subjected to any pre-treatment.
10. When a child feels that he / she
has to / must absolutely comply with their mother’s wishes, this often leads to heightened aggression.
1. must (have to)
2. must not
3. must not
4. must (has to)
5. must
6. have to / must
7. does not have to
8. must
9. does not have to
10. must
