424. In a few cases, whether may be expressed by doubling the preceding stroke. Illustrations: you know whether

it is

I will think whether you are

Exercise

425. In the following phrases, whether is to be expressed by doubling the preceding stroke:

can you (inverted) say whether the

can you (inverted) think whether you

I know whether you (inverted, do

I know whether you (inverted) have

you (inverted) know whether it is

I know whether you (inverted) think so *I would not say whether you

tell me whether you are

when you (inverted) have seen whether it is so