زبان فنی(15)

زمان ها­ (tenses) 

 

زمان های پرکاربرد در متون فنی بدین شرح هستند.

 

1- Simple present (حال ساده):

 در مورد وقایع روزانه (daily events) و عادت­ها (habits) صحبت می­کند.

سوالی، منفی و مجهول کردن این زمان در مثال های زیر آمده:

I study the book

The book is studied

Mechanical engineering deals with machines.

The recommended operating conditions are listed in Table 1.

You should wear protective clothing in the workshop.

The pump can also be heated, if necessary.

When this is done the tank interior and the intake and discharge filters should be given a thorough clean.

The pumps must be handled by specialized personnel to prevent knocks.

Do not adjust the capacity by means of the suction on-off valve.

Make sure that the rake lift control is set to manual.

Make sure that the cooling liquid be clean.

If pressure does increase above “cumulative value”, do not continue to close the flow control valve.