1.  Obviously he needs more time and becomes slower .

2.  It would need more time.

3.  Because comprehension need time .

4.  Another example, to plant trees need time also.

5.  It needs time.

6.  The developing of everything needs time.

7.  For example, learning English needs long time.

8.  All those things need long time.

9.  Things need time just as tree-planting needs watering.