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  1. Ken will be fond of Mary, so will Tom.
  2. Ken will be fond of Mary, so will Tom be.

3. A: Mary must be fond of Ken.

B: So she must.


4. A: Mary must be fond of Ken.

B: So she must be.

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NananaraKen will be fond of Mary, so will Tom.
Ken will be fond of Mary, so will Tom be.

These are comma splice errors. Also, saying that someone "will be fond" of another person is relatively unusual and may be wrong, depending on context. I would need to see more context.

Nananara3. A: Mary must be fond of Ken.
B: So she must.

B's reply seems rather formal or literary. This style is rather unusual in everyday language, though not impossible. More usual would be e.g. "Yes, she must".

Nananara4. A: Mary must be fond of Ken.
B: So she must be.

Also possible, with the same caveats.

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Thank you so much.


How about these below?


1. Ken must be fond of Mary, so must Tom.

2. Ken must be fond of Mary, so must Tom be.

NananaraHow about these below?
1. Ken must be fond of Mary, so must Tom.
2. Ken must be fond of Mary, so must Tom be.

These are also comma splice errors. You can say "Ken must be fond of Mary, and so must Tom". It is not necessary to repeat "be".

Sorry for my late replying.

Thank you so much.

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