Lately I have been paying attention to the way I pronounce the -ed part in the verbs when they're in past tense/participle. For example, I would say:

- I switched on the TV, trying to put the stress in the ed part. Otherwise, I believe people don't realize I'm talking about the past :?

- She sends it to me. Same problem here.

When I try to emphasize these sounds I have to make a kind of little pause to separate the -ed/s word from the next one. This strange thing is avoided if I make a liaison between these word, that is:

- I switchedon the TV
- She sendsit to me.

Actually I think this is what people do when speaking fast. Besides It sounds much more natural to me than the first one, though I think both ways are correct. Should I keep on doing these linking between words?