Minulý infinitiv v odborném textu

                         English for Earth Science – Věra Hranáčová, 2008

              Ask questions:
 1. Co způsobuje sesuvy
půdy?.....................................................................................
 2. Co může způsobit sesuv půdy? …………………………………………………………..
 3. Co způsobilo sesuv
půdy?.......................................................................................
 4. Co mohlo způsobit sesuvy
půdy?.........................................................................
 5. Čím může být sesuv půdy
způsoben?.................................................................
 6. Čím mohl být sesuv půdy
způsoben?.................................................................

If you have formed the questions correctly, you will lose no points in you exam.

Practice the following sentence transformations:

Vazba nominativ +  infinitiv s „to“

1.      In a landslide, it may appear that gravity is the only agent of erosion.
In a landslide, gravity may appear
….................................................................

Vazba nominativ +  minulý infinitiv

2.      It is not probable that gravity caused the rockslide.
Gravity is unlikely …………………………………………………………………………

Can/could/may/might + minulý infinitiv bez „to“

3.      Gravity probably did not cause the rockslide.

Gravity may not …….…………………….…..…..the rockslide. (=možná, že ne)
Gravity could not…………………………...…….the rockslide. (= určitě ne)
Gravity must ……………………………….…..… .the rockslide (= určitě ano)

Can/could/may/might  + trpný infinitiv bez „to“

4.      It is possible that gravity starts the rockslide.
The rockslide can …………………………………..gravity.

Can/could/may/might  + minulý trpný infinitiv bez „to“

5.      It is possible that rainwater running off the mountainside started the rockslide.
The landslide could …………………………………………………… rainwater.