- Half (of) my friends live abroad.

She spends half (of) her time travelling.

Of is not used in expressions of measurement and quantity.

I live half a mile from here. (NOT . . . half of a mile …)

How much is half a bottle of whisky?

(NOT … half of a bottle . . .)

We use half of before pronouns.

‘Did you like the books?’ ‘I’ve only read half of them ‘

Half of us are free on Tuesdays, and the other half on Thursdays.

- I’ve bought some chocolate. You can have half.

(NOT . . . the half.)

You can have the big half.

- I’ve been waiting for one and a half hours. (NOT . . . hour)

1 day 13 hours ago