VII. Підкресліть модальні дієслова та їх еквіваленти. Речення перекладіть.

1. Such defects may easily lead to a serious breakdown of the machine.

2. You should have changed the current strength at all points of the circuit.

3. We shall have to charter two more ships.

4. Some more heating is to produce the effect required.

5. We needn’t make a letter of guarantee a separate document apart from the contract. It is usually its integral part in the form of an appendix.