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返回课程 ASD-STE100（简化技术英语）规则部分Rule 3.4 Do not use helping verbs to make complex verb structures. 规则3.4不要用助动词来构成复杂的动词结构。
Do not use the past participle with the auxiliary verb “to have”. This will make a tense that is not approved.

Example:

Non-STE: The operator has adjusted the linkage.

(The present perfect is an unapproved tense.)

STE: The operator adjusted the linkage.

(The simple past tense is approved.)

Some complex verb structures include auxiliary or modal verbs (“can”, “must”, “will”, or “to be”), the infinitive of “to be” and the past participle. Such sentences are complex passive sentences.


Examples:

Non-STE: The volume control can be adjusted.

STE: You can adjust the volume control.

Non-STE: The temperature must be adjusted.

STE: Adjust the temperature.

Non-STE: The sleeve will be adjusted.

STE: You will adjust the sleeve.

Non-STE: The seat is to be installed before you install the cushion.
STE: Install the seat before you install the cushion.

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